ACT Prep Course

1

About This Course
- About This Course 1 FREE PREVIEW
- About This Course 2 FREE PREVIEW
2

Overview of the ACT
- Overview of the ACT - Math Test FREE PREVIEW
- Verbal - English Test FREE PREVIEW
- Verbal - Reading Test
- Verbal - Writing Test
- Science Test
- Pacing
- Scoring the ACT 1
- Scoring the ACT 2
- Skipping and Guessing
- The '2 out of 4' Rule
- Questions and Answers 1
- Questions and Answers 2
3

Math Orientation
- Math Orientation - Format FREE PREVIEW
- Scoring the Math Section
- Calculators
- Skipping and Guessing
- The Structure of this Part of the Course
- Directions and Reference Material 1
- Directions and Reference Material 2
4

Substitution
- Substitution 1 FREE PREVIEW
- Substitution Example 1 FREE PREVIEW
- Substitution 2
- Substitution Example 2
- Substitution Example 3
- Substitution Problem 1
- Substitution Problem 2
- Substitution Problem 3
- Substitution Problem 4
- Substitution Problem 5
- Substitution Problem 6
- Substitution Problem 7
- Substitution Problem 8
- Substitution Problem 9
- Substitution Problem 10
- Substitution Quiz FREE PREVIEW
5

Substitution - Plugging In
- Substitution - Plugging In
- Substitution - Plugging In Example FREE PREVIEW
- Substitution Plugging In Problem 1
- Substitution Plugging In Problem 2
- Substitution Plugging In Problem 3
- Substitution Plugging In Quiz
6

Math Notes
- Math Notes 1 FREE PREVIEW
- Math Notes 2
- Math Notes 3
- Math Notes 4
- Math Notes 5
- Math Notes 6
- Math Notes 7
- Math Notes 8
- Math Notes 9 Example 1
- Math Notes 10
- Math Notes 11
- Math Notes 12
- Math Notes 13
- Math Notes14 Example 2
- Math Notes 15
- Math Notes 16
- Math Notes 17
- Math Notes 18
- Math Notes 19
- Math Notes 20
- Math Notes Problem 1
- Math Notes Problem 2
- Math Notes Problem 3
- Math Notes Problem 4
- Math Notes Problem 5
- Math Notes Quiz
7

Number Theory
- Number Theory 1 FREE PREVIEW
- Number Theory 2 Example 1 FREE PREVIEW
- Number Theory 3
- Number Theory 4
- Number Theory 5 Example 2
- Number Theory 6
- Number Theory 7
- Number Theory 8
- Number Theory 9
- Number Theory 10
- Number Theory 11
- Number Theory 12
- Number Theory 13
- Number Theory 14
- Number Theory 15
- Number Theory 16
- Number Theory 17
- Number Theory 18
- Number Theory 19
- Number Theory 20 Example 3
- Number Theory 21 Example 4
- Number Theory 22 Example 5
- Number Theory Problem 1
- Number Theory Problem 2
- Number Theory Problem 3
- Number Theory Problem 4
- Number Theory Problem 5
- Number Theory Problem 6
- Number Theory Problem 7
- Number Theory Problem 8
- Number Theory Problem 9
- Number Theory Problem 10
- Number Theory Problem 11
- Number Theory Problem 12
- Number Theory Problem 13
- Number Theory Problem 14
- Number Theory Problem 15
- Number Theory Problem 16
- Number Theory Problem 17
- Number Theory Problem 18
- Number Theory Problem 19
- Number Theory Problem 20
- Number Theory Quiz
8

Geometry
- Geometry - Introduction FREE PREVIEW
- Lines and Angles 1
- Lines and Angles 2
- Lines and Angles 3
- Lines and Angles 4 Example 1
- Lines and Angles 5 Example 2
- Lines and Angles 6
- Lines and Angles 7
- Lines and Angles 8
- Triangles 1
- Triangles 2
- Triangles Example 1
- Triangles 3
- Triangles 4
- Triangles 5
- Triangles 6
- Triangles Example 2
- Triangles 7
- Quadrilaterals 1
- Quadrilaterals Example
- Quadrilaterals 2
- Quadrilaterals 3
- Volume
- Volume Example
- Circles 1
- Circles 2
- Circles 3
- Circles 4
- Circles Example
- Shaded Regions
- Shaded Regions Example1
- Shaded Regions Example2
- 'Birds-Eye' View
- 'Birds-Eye' View Example
- Extreme Cases
- Extreme Cases Example 1
- Extreme Cases Example 2
- Eye-Balling
- Eye-Balling Example 1
- Eye-Balling Example 2
- Geometry Problem 1
- Geometry Problem 2
- Geometry Problem 3
- Geometry Problem 4
- Geometry Problem 5
- Geometry Problem 6
- Geometry Problem 7
- Geometry Problem 8
- Geometry Problem 9
- Geometry Problem 10
- Geometry Problem 11
- Geometry Problem 12
- Geometry Problem 13
- Geometry Problem 14
- Geometry Problem 15
- Geometry Problem 16
- Geometry Problem 17
- Geometry Problem 18
- Geometry Problem 19
- Geometry Problem 20
- Geometry Problem 21
- Geometry Problem 22
- Geometry Problem 23
- Geometry Problem 24
- Geometry Problem 25
- Geometry Problem 26
- Geometry Problem 27
- Geometry Quiz
9

Coordinate Geometry
- Coordinate Geometry - Introduction 1 FREE PREVIEW
- Introduction 2
- Introduction 3
- Introduction 4
- Introduction Example
- Distance Formula
- Distance Formula Example
- Midpoint Formula
- Midpoint Formula Example
- Slope Formula
- Slope Formula Example
- Slope-Intercept Form
- Slope-Intercept Form Example
- Intercepts
- Intercepts Example
- Areas and Perimeters
- Areas and Perimeters Example 1
- Areas and Perimeters Example 2
- Coordinate Geometry Problem 1
- Coordinate Geometry Problem 2
- Coordinate Geometry Problem 3
- Coordinate Geometry Problem 4
- Coordinate Geometry Problem 5
- Coordinate Geometry Problem 6
- Coordinate Geometry Problem 7
- Coordinate Geometry Problem 8
- Coordinate Geometry Problem 9
- Coordinate Geometry Problem 10
- Coordinate Geometry Quiz
10

Elimination Strategies
- Elimination Strategies 1 FREE PREVIEW
- Elimination Strategies 2
- Elimination Strategies 3
- Elimination Strategies 4
- Elimination Strategies 5
- Elimination Strategies Problem 1
- Elimination Strategies Problem 2
- Elimination Strategies Problem 3
- Elimination Strategies Problem 4
- Elimination Strategies Problem 5
- Elimination Strategies Problem 6
- Elimination Strategies Problem 7
- Elimination Strategies Problem 8
- Elimination Strategies Problem 9
11

Inequalities
- Inequalities Introduction FREE PREVIEW
- Positive and Negative Numbers 1
- Positive and Negative Numbers 2
- Positive and Negative Numbers Example
- Absolute Value
- Absolute Value Example
- Higher Order Inequalities 1
- Higher Order Inequalities 2
- Transitive Property
- Transitive Property Example
- Like Inequalities Can Be Added
- Like Inequalities Can Be Added Example
- Inequalities Problem 1
- Inequalities Problem 2
- Inequalities Problem 3
- Inequalities Problem 4
- Inequalities Problem 5
- Inequalities Problem 6
- Inequalities Problem 7
- Inequalities Problem 8
- Inequalities Problem 9
- Inequalities Problem 10
- Inequalities Problem 11
- Inequalities Problem 12
- Inequalities Problem 13
- Inequalities Problem 14
- Inequalities Quiz
12

Fractions and Decimals
- Fractions Introduction FREE PREVIEW
- Fractions Cross-Multiplying
- Fractions Cross-Multiplying Example
- Fractions Lowest Terms
- Fractions Lowest Terms Example
- Fractions Solving by Multiplying by the LCD
- Fractions Solving by Multiplying by the LCD Example
- Fractions Complex
- Fractions Complex Example 1
- Fractions Complex Example 2
- Fractions Multiplying
- Fractions Adding by Cross-multiplying
- Fractions Adding by Cross-multiplying Example 1
- Fractions Adding by Cross-multiplying Example 2
- Fractions Adding by Getting a Common Denominator
- Fractions Finding the Common Denominator
- Fractions Unusual Behavior
- Decimals Introduction
- Decimals Adding, Subtracting, Multiplying, Dividing
- Decimals Example 1
- Decimals Example 2
- Decimals Example 3
- Fractions and Decimals Problem 1
- Fractions and Decimals Problem 2
- Fractions and Decimals Problem 3
- Fractions and Decimals Problem 4
- Fractions and Decimals Problem 5
- Fractions and Decimals Problem 6
- Fractions and Decimals Problem 7
- Fractions and Decimals Problem 8
- Fractions and Decimals Problem 9
- Fractions and Decimals Problem 10
- Fractions and Decimals Problem 11
- Fractions and Decimals Quiz
13

Equations
- Equations - PEMDAS FREE PREVIEW
- PEMDAS Example 1 FREE PREVIEW
- PEMDAS Example 2
- Equations Properties of Equations 1
- Equations Properties of Equations 2
- Solving for Expressions
- Solving for Expressions Example
- 'Triple' Equations
- 'Triple' Equations Example
- Equations Adding Equations
- Equations Adding Equations Example
- Equations Method of Substitution
- Equations Problem 1
- Equations Problem 2
- Equations Problem 3
- Equations Problem 4
- Equations Problem 5
- Equations Problem 6
- Equations Problem 7
- Equations Problem 8
- Equations Problem 9
- Equations Problem 10
- Equations Problem 11
- Equations Problem 12
- Equations Problem 13
- Equations Problem 14
- Equations Quiz
14

Averages
- Averages - Definition FREE PREVIEW
- Example FREE PREVIEW
- Weighted average
- Using an average to find a number
- Using an average to find a number Example
- Average Speed
- Average Speed Example
- Averages Problem 1
- Averages Problem 2
- Averages Problem 3
- Averages Problem 4
- Averages Problem 5
- Averages Quiz
15

Ratio and Proportion
- Ratio - Introduction FREE PREVIEW
- Ratio Example FREE PREVIEW
- Proportion - Introduction
- Direct Proportion
- Direct Proportion Example
- Direct Proportion Word Problems
- Direct Proportion Word Problems Example 1
- Direct Proportion Word Problems Example 2
- Proportion Order
- Inverse Proportion
- Inverse Proportion Word Problems
- Inverse Proportion Word Problems Example
- Summary
- Summary Example
- Ratio and Proportion Problem 1
- Ratio and Proportion Problem 2
- Ratio and Proportion Problem 3
- Ratio and Proportion Problem 4
- Ratio and Proportion Problem 5
- Ratio and Proportion Problem 6
- Ratio and Proportion Problem 7
- Ratio and Proportion Problem 8
- Ratio and Proportion Problem 9
- Ratio and Proportion Problem 10
- Ratio and Proportion Quiz
16

Exponents and Roots
- Exponents Introduction FREE PREVIEW
- Exponents The Rules 1
- Exponents The Rules 2
- Exponents The Rules Example 1
- Exponents The Rules Example2
- Exponents The Rules Example 3
- Roots 1
- Roots 2
- Roots 3
- Roots 4
- Roots 5
- Roots 6
- Roots 7
- Roots 8
- Roots Example 1
- Roots Example 2
- Rationalizing
- Rationalizing Example 1
- Rationalizing Example 2
- Exponents and Roots Problem 1
- Exponents and Roots Problem 2
- Exponents and Roots Problem 3
- Exponents and Roots Problem 4
- Exponents and Roots Problem 5
- Exponents and Roots Problem 6
- Exponents and Roots Problem 7
- Exponents and Roots Problem 8
- Exponents & Roots Quiz
17

Factoring
- Factoring - Introduction FREE PREVIEW
- Distributive Rule
- Distributive Rule Example 1
- Distributive Rule Example 2
- Difference of Squares
- Difference of Squares Example
- Perfect Square Trinomials
- Perfect Square Trinomials Example
- General Trinomials
- General Trinomials Example
- Complete Factoring
- Factoring Problem 1
- Factoring Problem 2
- Factoring Problem 3
- Factoring Problem 4
- Factoring Problem 5
- Factoring Problem 6
- Factoring Problem 7
- Factoring Quiz
18

Algebraic Expressions
- Algebraic Expressions - Introduction FREE PREVIEW
- Adding and Subtracting
- Commutative Property
- Associative Property
- Associative Property examples
- Parentheses
- Order of Operations - PEMDAS
- Order of Operations - PEMDAS - Example
- FOIL Multiplication
- FOIL Multiplication Examples
- Division
- Division Example
- Algebraic Expressions Problem 1
- Algebraic Expressions Problem 2
- Algebraic Expressions Problem 3
- Algebraic Expressions Problem 4
- Algebraic Expressions Problem 5
- Algebraic Expressions Problem 6
- Algebraic Expressions Problem 7
- Algebraic Expressions Problem 8
- Algebraic Expressions Problem 9
- Algebraic Expressions Quiz
19

Percents
- Percents 1 FREE PREVIEW
- Percents 2
- Percents 3
- Percents 4
- Percents 5
- Percents 6
- Percents 7
- Percents Example 1
- Percents Example 2
- Percents Example 3
- Percents Example 4
- Percents 8
- Percents Example 5
- Percents Problem 1
- Percents Problem 2
- Percents Problem 3
- Percents Problem 4
- Percents Problem 5
- Percents Problem 6
- Percents Problem 7
- Percents Quiz
20

Graphs
- Graphs Introduction FREE PREVIEW
- Example 1 FREE PREVIEW
- Example 2
- Example 3
- Example 4
- Graphs Problem 1
- Graphs Problem 2
- Graphs Problem 3
- Graphs Problem 4
- Graphs Problem 5
- Graphs Problem 6
- Graphs Problem 7
- Graphs Problem 8
- Graphs Problem 9
- Graphs Problem 10
- Graphs Problem 11
- Graphs Problem 12
- Graphs Problem 13
- Graphs Problem 14
- Graphs Problem 15
- Graphs Quiz
21

Word Problems
- Word Problems Translating Words into Mathematical Symbols 1 FREE PREVIEW
- Word Problems Translating Words into Mathematical Symbols 2
- Guidelines for Solving Word Problems 1
- Guidelines for Solving Word Problems 2
- Guidelines for Solving Word Problems 3
- Motion Problems - Overtake
- Motion Problems - Overtake - Example
- Motion Problems - Opposite Directions
- Motion Problems - Opposite Directions - Example
- Motion Problems - Round Trip
- Motion Problems - Round Trip - Example
- Motion Problems - Compass Headings
- Motion Problems - Compass Headings - Example
- Motion Problems - Circular Motion
- Motion Problems - Circular Motion - Example 1
- Motion Problems - Circular Motion - Example 2
- Work Problems
- Work Problems Example 1
- Work Problems Example 2
- Mixture Problems
- Mixture Problems Example
- Coin Problems
- Coin Problems Example
- Age Problems
- Age Problems Example
- Interest Problems
- Interest Problems Example
- Word Problems Problem 1
- Word Problems Problem 2
- Word Problems Problem 3
- Word Problems Problem 4
- Word Problems Problem 5
- Word Problems Problem 6
- Word Problems Problem 7
- Word Problems Problem 8
- Word Problems Problem 9
- Word Problems Problem 10
- Word Problems Problem 11
- Word Problems Problem 12
- Word Problems Problem 13
- Word Problems Problem 14
- Word Problems Problem 15
- Word Problems Problem 16
- Word Problems Problem 17
- Word Problems Quiz
22

Sequences and Series
- Sequences - Introduction FREE PREVIEW
- Example 1 FREE PREVIEW
- Example 2
- Arithmetic Progressions
- Arithmetic Progressions Example
- Arithmetic Progressions - Sequence Formulas 1
- Arithmetic Progressions - Sequence Formulas 2
- Arithmetic Progressions - Sequence Formulas 3
- Geometric Progressions
- Geometric Progressions Example
- Geometric Progressions - Sequence Formulas 1
- Geometric Progressions - Sequence Formulas 2
- Geometric Progressions - Sequence Formulas 3
- Series
- Series Example 1
- Series Example 2
- Sequences and Series Problem 1
- Sequences and Series Problem 2
- Sequences and Series Problem 3
- Sequences and Series Problem 4
- Sequences and Series Problem 5
- Sequences and Series Quiz
23

Counting
- Counting - Overlapping Sets FREE PREVIEW
- Counting - Overlapping Sets - Example FREE PREVIEW
- The Number of Integers Between Two Integers
- The Number of Integers Between Two Integers Example
- Fundamental Principle of Counting
- Fundamental Principle of Counting Example
- Miscellaneous Counting Problems
- Miscellaneous Counting Problems Example 1
- Miscellaneous Counting Problems Example 2
- Counting Problem 1
- Counting Problem 2
- Counting Problem 3
- Counting Problem 4
- Counting Problem 5
- Counting Quiz
24

Probability and Statistics
- Probability Introduction 1 FREE PREVIEW
- Probability Introduction 2
- Probability Introduction 3
- Probability Introduction 4
- Consecutive Probabilities 1
- Consecutive Probabilities 2
- Either-Or Probabilities 1
- Either-Or Probabilities 2
- Either-Or Probabilities 3
- Either-Or Probabilities 4
- Geometric Probability
- Statistics Introduction
- Median
- Median Example
- Mode
- Range
- Standard Deviation
- Standard Deviation Example
- Probability and Statistics Problem 1
- Probability and Statistics Problem 2
- Probability and Statistics Problem 3
- Probability and Statistics Problem 4
- Probability and Statistics Problem 5
- Probability and Statistics
25

Functions
- Definition of a Function 1 FREE PREVIEW
- Definition of a Function 2
- Domain and Range 1
- Domain and Range 2
- Domain and Range 3
- Graphs 1
- Graphs 2
- Translations of Graphs 1
- Translations of Graphs 2
- Translations of Graphs 3
- Translations of Graphs 4
- Translations of Graphs 5
- Translations of Graphs 6
- Reflections of Graphs 1
- Reflections of Graphs 2
- Reflections of Graphs 3
- Reflections of Graphs 4
- Reflections of Graphs 5
- Reflections of Graphs 6
- Reflections of Graphs 7
- Reflections of Graphs 8
- Evaluation and Composition of Functions 1
- Evaluation and Composition of Functions 2
- Evaluation and Composition of Functions 3
- Evaluation and Composition of Functions 4
- Evaluation and Composition of Functions 5
- Evaluation and Composition of Functions 6
- Evaluation and Composition of Functions Example
- Quadratic Functions 1
- Quadratic Functions 2
- Quadratic Functions 3
- Quadratic Functions 4
- Quadratic Functions 5
- Quadratic Functions Example
- Qualitative Behavior of Graphs and Functions
- Qualitative Behavior of Graphs and Functions Example
- Functions as Models of Real-Life Situations
- Functions as Models of Real-Life Situations Example
- Functions Problem 1
- Functions Problem 2
- Functions Problem 3
- Functions Problem 4
- Functions Quiz
26

Logarithms
- Logarithms - Definition FREE PREVIEW
- Logarithms - Definition - Examples FREE PREVIEW
- Logs and Properties of Exponents
- Pop Quiz
- Properties of Logs
- Properties of Logs Examples 1
- Properties of Logs Examples 2
- Properties of Logs Examples 3
- Properties of Logs Examples 4
- Solving Exponential Equations by Using Logs
- Solving Exponential Equations by Using Logs Example
- Solving Exponential Equations by Using Logs Example (continued)
- Graphs of Logarithmic Functions 1
- Graphs of Logarithmic Functions 2
- Graphs of Logarithmic Functions 3
- Graphs of Logarithmic Functions 4
- Graphs of Logarithmic Functions 5
- Graphs of Exponential Functions 1
- Graphs of Exponential Functions 2
- Logarithms Problem 1
- Logarithms Problem 2
- Logarithms Problem 3
- Logarithms Problem 4
- Logarithms Problem 5
- Logarithms Quiz
27

Complex Numbers
- Complex Numbers Introduction 1 FREE PREVIEW
- Complex Numbers Definition
- Example
- Formulas 1
- Examples
- Formulas 2
- Conjugate
- Plotting Complex Numbers in the Plane
- Absolute Value
- Absolute Value Examples
- Complex Numbers Problem 1
- Complex Numbers Problem 2
- Complex Numbers Problem 3
- Complex Numbers Problem 4
- Complex Numbers Problem 5
- Complex Numbers Quiz
28

Matrices
- Matrices Introduction FREE PREVIEW
- Adding Matrices
- Subtracting Matrices
- The Zero Matrix and Scalar Multiplication
- Multiplying Matrices 1
- Multiplying Matrices 2
- Applications of Matrices
- Matrices Problem 1
- Matrices Problem 2
- Matrices Problem 3
- Matrices Quiz
29

Trigonometry
- Trigonometry Introduction 1 FREE PREVIEW
- Trigonometry Introduction 2
- Trigonometric Formulas You Must Know
- Example 1
- Example 2
- Trigonometric Identities You Should Be Familiar With 1
- Example 3
- Trigonometric Identities You Should Be Familiar With 2
- Trigonometric Identities You Should Be Familiar With 3
- Formulas for Solving Non-right Triangles - Law of Cosines
- Example 4
- Formulas for Solving Non-right Triangles - Law of Sines
- Trigonometric Values for Special Angles
- Example 5
- Trigonometry Problem 1
- Trigonometry Problem 2
- Trigonometry Problem 3
- Trigonometry Quiz
30

Grammar Introduction
- Grammar - Mechanics FREE PREVIEW
- Grammar - Usage
31

Pronoun Errors
- Pronoun Errors 1 - Usage FREE PREVIEW
- Pronoun Errors 2 - Common Pronouns
- Pronoun Errors 3
- Pronoun Errors 4
- Pronoun Errors 5
- Pronoun Errors 6
- Pronoun Errors 7
- Pronoun Errors 8
- Pronoun Errors 9
- Pronoun Errors 10
- Pronoun Errors 11
- Pronoun Errors Problem 1
- Pronoun Errors Problem 2
- Pronoun Errors Problem 3
- Pronoun Errors Quiz
32

Subject-Verb Agreement
- Subject-Verb Agreement - Number and Person FREE PREVIEW
- Intervening Phrases and Clauses 1
- Intervening Phrases and Clauses 2
- Intervening Phrases and Clauses 3
- Reversed Order 1
- Reversed Order 2
- Reversed Order 3
- Reversed Order 4
- Reversed Order 5
- Subject-Verb Agreement Problem 1
- Subject-Verb Agreement Problem 2
- Subject-Verb Agreement Problem 3
- Subject-Verb Agreement Problem 4
- Subject-Verb Agreement Quiz
33

Misplaced Modifiers
- Misplaced Modifiers 1 FREE PREVIEW
- Misplaced Modifiers 2
- Misplaced Modifiers 3
- Misplaced Modifiers 4
- Misplaced Modifiers 5
- Misplaced Modifiers 6
- Misplaced Modifiers 7
- Misplaced Modifiers 8
- Misplaced Modifiers Problem 1
- Misplaced Modifiers Problem 2
- Misplaced Modifiers Problem 3
- Misplaced Modifiers Problem 4
- Misplaced Modifiers Problem 5
- Misplaced Modifiers Quiz
34

Faulty Parallelism
- Faulty Parallelism 1 FREE PREVIEW
- Faulty Parallelism 2
- Faulty Parallelism 3
- Faulty Parallelism 4
- Faulty Parallelism 5
- Faulty Parallelism 6
- Faulty Parallelism 7
- Faulty Parallelism 8
- Faulty Parallelism 9
- Faulty Parallelism 10
- Faulty Parallelism 11
- Faulty Parallelism 12
- Faulty Parallelism Problem 1
- Faulty Parallelism Problem 2
- Faulty Parallelism Quiz
35

Faulty Verb Tense
- Faulty Verb Tense - Definition FREE PREVIEW
- Present Tense
- Past Tense
- Past Participle
- Present Participle (ing)
- Passive Voice 1
- Passive Voice 2
- Faulty Verb Tense Problem 1
- Faulty Verb Tense Problem 2
- Faulty Verb Tense Quiz
36

Idiom
- Idiom - Introduction FREE PREVIEW
- Accept:Except
- Account for
- Adapted to:for:from
- Affect:Effect
- All ready vs Already, Alot vs A lot, Among:Between
- As:Like
- As to
- Being that vs. Since
- Beside:Besides
- Center on vs. Center around
- Consensus of opinion, Correspond to:with
- Double negatives, Doubt that vs Doubt whether
- Farther:Further, Fewer:Less
- Identical with, In contrast to, Independent of
- It's:Its
- Likely vs Liable
- Not only . . . but also
- On account of vs. Because
- One another:Each other
- Plus vs. And
- Plus vs. And (continued)
- Regard vs. Regards, Regardless vs. Irregardless
- Retroactive to, Speak to:with
- The reason is beacause
- Whether vs. As to whether
- Whether vs. If
- Idiom Problem 1
- Idiom Problem 2
- Idiom Problem 3
- Idiom Problem 4
- Idiom Problem 5
- Idiom Quiz
37

Reading Test Introduction
- Reading Test Introduction 1 FREE PREVIEW
- Reading Test Introduction 2
- Reading Test Introduction 3
- Reading Methods 1
- Reading Methods 2
- Reading Methods 3
- Reading Methods 4
38

The Six Questions
- The Six Questions - Introduction FREE PREVIEW
- The Six Questions Original Passage
- Main Idea Questions 1 FREE PREVIEW
- Main Idea Questions 2
- Example
- Description Questions 1
- Description Questions 2
- Example
- Description Questions 3
- Description Questions 4
- Description Questions 5
- Writing Technique Questions 1
- Compare and Contrast 1
- Compare and Contrast 2
- Example
- Cause and Effect
- Example
- Position and Evidence
- Extension Questions
- Example 1
- Example 2
- Application Questions 1
- Application Questions 2
- Example
- Tone Questions 1
- Example
- Tone Questions 2
- Tone Questions 3
- Tone Questions 4
- The Six Questions - PTR 1
- The Six Questions - PTR 2
- The Six Questions - PTR 3
- The Six Questions - PTR 4
- The Six Questions - PTR 5
- The Six Questions Mentor Exercise 1
- The Six Questions Mentor Exercise 2
- The Six Questions Mentor Exercise 3
- The Six Questions Mentor Exercise 4
- The Six Questions Mentor Exercise 5
- The Six Questions Mentor Exercise 6
- The Six Questions Solo Exercise 1
- The Six Questions Solo Exercise 2
- The Six Questions Solo Exercise 3
- The Six Questions Solo Exercise 4
- The Six Questions Solo Exercise 5
39

Pivotal Words
- Pivotal Words Introduction 1 FREE PREVIEW
- Pivotal Words Introduction 2
- Pivotal Words Introduction 3
- Pivotal Words Introduction 4
- Pivotal Words Original Passage
- Example 1
- Example 2
- Example 3
- Pivotal Words - PTR 1
- Pivotal Words - PTR 2
- Mentor Exercise Passage
- Mentor Exercise Problem 1
- Mentor Exercise Problem 2
- Mentor Exercise Problem 3
- Mentor Exercise Problem 4
- Mentor Exercise Problem 5
- Mentor Exercise Problem 6
- Solo Exercise Passage
- Solo Exercise Problem 1
- Solo Exercise Problem 2
- Solo Exercise Problem 3
- Solo Exercise Problem 4
- Solo Exercise Problem 5
- Solo Exercise Problem 6
40

The Three-Step Method
- The Three-Step Method 1 FREE PREVIEW
- The Three-Step Method 2
- The Three-Step Method 3
- The Three-Step Method 4
- The Three-Step Method 5
- The Three-Step Method 6
- Example Pre-Analysis
- Example Passage
- Example 1
- Example 2
- Example 3
- Example 4
- Example 5
- Example 6
- The Three-Step Method - PTR 1
- The Three-Step Method - PTR 2
- The Three-Step Method Mentor Exercise Passage Part 1
- The Three-Step Method Mentor Exercise Passage Part 2
- The Three-Step Method Mentor Exercise 1
- The Three-Step Method Mentor Exercise 2
- The Three-Step Method Mentor Exercise 3
- The Three-Step Method Mentor Exercise 4
- The Three-Step Method Mentor Exercise 5
- The Three-Step Method Solo Exercise Passage
- The Three-Step Method Solo Exercise 1
- The Three-Step Method Solo Exercise 2
- The Three-Step Method Solo Exercise 3
- The Three-Step Method Solo Exercise 4
- The Three-Step Method Solo Exercise 5
41

Writing Test
- Introduction FREE PREVIEW
- How to Get a Top-Half Score FREE PREVIEW
- The Essay FREE PREVIEW
- Style
- Warm-Up Drills
- Presenting a Perspective on an Issue
- Patterns of Development
- Planning & Writing
- Sample Prompts & Essays
- Practice
- Sample Essays
42

Practice Test Passage 1
- Problem 1
- Problem 2
- Problem 3
- Problem 4
- Problem 5
- Problem 6
- Problem 7
- Problem 8
- Problem 9
- Problem 10
- Problem 11
- Problem 12
- Problem 13
- Problem 14
- Problem 15
43

Practice Test Passage 2
- Problem 1
- Problem 2
- Problem 3
- Problem 4
- Problem 5
- Problem 6
- Problem 7
- Problem 8
- Problem 9
- Problem 10
- Problem 11
- Problem 12
- Problem 13
- Problem 14
- Problem 15
44

Practice Test Passage 3
- Problem 1
- Problem 2
- Problem 3
- Problem 4
- Problem 5
- Problem 6
- Problem 7
- Problem 8
- Problem 9
- Problem 10
- Problem 11
- Problem 12
- Problem 13
- Problem 14
- Problem 15
45

Practice Test Passage 4
- Problem 1
- Problem 2
- Problem 3
- Problem 4
- Problem 5
- Problem 6
- Problem 7
- Problem 8
- Problem 9
- Problem 10
- Problem 11
- Problem 12
- Problem 13
- Problem 14
- Problem 15
46

Science - Orientation
- Science Orientation 1 FREE PREVIEW
- Science Orientation 2
- Science Orientation 3
- Science Orientation 4
47

Physics - Introduction
- Philosophy of This Section 1 FREE PREVIEW
- Philosophy of This Section 2
- Reading the Physics Review Section
- Units 1
- Units 2
- Units 3
- Equations 1
- Equations 2
- Equations 3
- Equations 4
- Equations 5
- Equations 6
- Equations 7
- Equations 8
- Physics Review Summary
- Physics Review Problem 1
- Physics Review Problem 2
- Physics Review Problem 3
- Physics Review Problem 4
- Physics Review Problem 5
- Physics Review Problem 6
- Physics Review Problem 7
- Physics Review Problem 8
- Physics Review Problem 9
- Physics Review Problem 10
- Physics Review Problem 11
- Physics Review Problem 12
- Physics Review Problem 13
- Physics Review Problem 14
- Physics Review Problem 15
- Physics Review Problem 16
- Physics Review Problem 17
- Physics Review Problem 18
- Physics Review Problem 19
- Physics Review Problem 20
- Physics Review Problem 21
- Physics Review Problem 22
- Physics Review Problem 23
- Physics Review Problem 24
- Physics Review Problem 25
48

Physics - Language of Motion
- The Language of Motion FREE PREVIEW
- Force and Mass 1 FREE PREVIEW
- Force and Mass 2
- Force and Mass 3
- Vectors 1
- Example 1
- Example 2
- Example 3
- Vectors 2
- Velocity, Speed, and All That 1
- Velocity, Speed, and All That 2
- Velocity, Speed, and All That 3
- Example
- Acceleration 1
- Acceleration 2
- Examples 1
- Examples 2
- Examples 3
- Graphs
- Example 1
- Example 2
- Example 2 (continued)
- Example 3
- Uniform Acceleration 1
- Uniform Acceleration 2
- Example
- Kinematic Equations for Constant Acceleration
- Example
- Example
- The Language of Motion - Summary
- The Language of Motion Problem 1
- The Language of Motion Problem 2
- The Language of Motion Problem 3
- The Language of Motion Problem 4
- The Language of Motion Problem 5
- The Language of Motion Problem 6
- The Language of Motion Problem 7
- The Language of Motion Problem 8
- The Language of Motion Problem 9
- The Language of Motion Problem 10
- The Language of Motion Problem 11
- The Language of Motion Problem 12
- The Language of Motion Problem 13
- The Language of Motion Problem 14
- The Language of Motion Problem 15
- The Language of Motion Problem 16
- The Language of Motion Problem 17
- The Language of Motion Problem 18
- The Language of Motion Problem 19
- The Language of Motion Problem 20
- The Language of Motion Problem 21
- The Language of Motion Problem 22
- The Language of Motion Problem 23
- The Language of Motion Problem 24
- The Language of Motion Problem 25
- The Language of Motion Problem 26
- The Language of Motion Problem 27
- The Language of Motion Problem 28
- The Language of Motion Problem 29
- The Language of Motion Problem 30
- The Language of Motion Problem 31
- The Language of Motion Problem 32
- The Language of Motion Problem 33
- The Language of Motion Problem 34
- The Language of Motion Problem 35
- The Language of Motion Problem 36
- The Language of Motion Problem 37
- The Language of Motion Problem 38
- The Language of Motion Problem 39
- The Language of Motion Problem 40
- The Language of Motion Problem 41
- The Language of Motion Problem 42
- The Language of Motion Problem 43
- The Language of Motion Problem 44
- The Language of Motion Problem 45
49

Physics - Laws of Motion
- First Law of Motion 1 FREE PREVIEW
- First Law of Motion 2 FREE PREVIEW
- First Law of Motion 3
- First Law of Motion 4
- First Law of Motion 5
- Example
- Example Part b
- Example Part c
- Second Law of Motion 1
- Second Law of Motion 2
- Second Law of Motion 3
- Second Law of Motion 4
- Example 1
- Example 2
- Third Law of Motion
- Example 1
- Example 2
- Example 3
- Force Diagrams 1
- Force Diagrams 2
- Example 1
- Example 2
- Example 3
- Laws of Motion - Summary
- Laws of Motion Problem 1
- Laws of Motion Problem 2
- Laws of Motion Problem 3
- Laws of Motion Problem 4
- Laws of Motion Problem 5
- Laws of Motion Problem 6
- Laws of Motion Problem 7
- Laws of Motion Problem 8
- Laws of Motion Problem 9
- Laws of Motion Problem 10
- Laws of Motion Problem 11
- Laws of Motion Problem 12
- Laws of Motion Problem 13
- Laws of Motion Problem 14
- Laws of Motion Problem 15
- Laws of Motion Problem 16
- Laws of Motion Problem 17
- Laws of Motion Problem 18
- Laws of Motion Problem 19
- Laws of Motion Problem 20
- Laws of Motion Problem 21
50

Physics - Gravitation
- Gravitation - The Law of Gravitation 1 FREE PREVIEW
- The Law of Gravitation 2 FREE PREVIEW
- Example 1
- Example 2
- The Law of Gravitation 3
- Surface of the Earth
- Free Fall 1
- Example 1
- Example 2
- Free Fall 2
- Horizontal and Vertical Motion 1
- Horizontal and Vertical Motion 2
- Horizontal and Vertical Motion 3
- Horizontal and Vertical Motion 4
- Horizontal and Vertical Motion 5
- Horizontal and Vertical Motion 6
- Horizontal and Vertical Motion 7
- Example 1
- Example 2
- Horizontal and Vertical Motion 8
- Gravitation - Summary
- Gravitation Problem 1
- Gravitation Problem 2
- Gravitation Problem 3
- Gravitation Problem 4
- Gravitation Problem 5
- Gravitation Problem 6
- Gravitation Problem 7
- Gravitation Problem 8
- Gravitation Problem 9
- Gravitation Problem 10
- Gravitation Problem 11
- Gravitation Problem 12
- Gravitation Problem 13
- Gravitation Problem 14
- Gravitation Problem 15
- Gravitation Problem 16
- Gravitation Problem 17
- Gravitation Problem 18
- Gravitation Problem 19
- Gravitation Problem 20
- Gravitation Problem 21
- Gravitation Problem 22
- Gravitation Problem 23
- Gravitation Problem 24
- Gravitation Problem 25
- Gravitation Problem 26
- Gravitation Problem 27
- Gravitation Problem 28
- Gravitation Problem 29
- Gravitation Problem 30
- Gravitation Problem 31
- Gravitation Problem 32
- Gravitation Problem 33
51

Physics - Planes and Circles
- Planes and Circles - Horizontal and Vertical Motion, Again 1 FREE PREVIEW
- Horizontal and Vertical Motion, Again 2 FREE PREVIEW
- Example
- Inclined Planes and Force Components
- Example
- Circular Motion, Qualitative Description 1
- Circular Motion, Qualitative Description 2
- Circular Motion, Qualitative Description 3
- Example 1
- Example 2
- Example 3
- Circular Motion, Quantitative Description
- Example 1
- Example 2
- Example 3
- Example 4
- Planes and Circles - Summary
- Planes and Circles Problem 1
- Planes and Circles Problem 2
- Planes and Circles Problem 3
- Planes and Circles Problem 4
- Planes and Circles Problem 5
- Planes and Circles Problem 6
- Planes and Circles Problem 7
- Planes and Circles Problem 8
- Planes and Circles Problem 9
- Planes and Circles Problem 10
- Planes and Circles Problem 11
- Planes and Circles Problem 12
- Planes and Circles Problem 13
- Planes and Circles Problem 14
- Planes and Circles Problem 15
- Planes and Circles Problem 16
- Planes and Circles Problem 17
- Planes and Circles Problem 18
- Planes and Circles Problem 19
- Planes and Circles Problem 20
- Planes and Circles Problem 21
- Planes and Circles Problem 22
- Planes and Circles Problem 23
- Planes and Circles Problem 24
- Planes and Circles Problem 25
- Planes and Circles Problem 26
- Planes and Circles Problem 27
- Planes and Circles Problem 28
- Planes and Circles Problem 29
- Planes and Circles Problem 30
- Planes and Circles Problem 31
- Planes and Circles Problem 32
- Planes and Circles Problem 33
- Planes and Circles Problem 34
- Planes and Circles Problem 35
52

Biology - Introduction
- Biology Introduction - Philosophy of the Biology Review Section FREE PREVIEW
- Biology 1 FREE PREVIEW
- Biology 2
- The Scientific Method 1
- The Scientific Method 2
- Characteristics of Life 1
- Characteristics of Life 2
- Structure and function
- Biology Introduction Problem 1
- Biology Introduction Problem 2
- Biology Introduction Problem 3
- Biology Introduction Problem 4
53

Biology - Biological Molecules
- Biological Molecules - Introduction FREE PREVIEW
- Carbohydrates 1 FREE PREVIEW
- Carbohydrates 2
- Carbohydrates 3
- Lipids 1
- Lipids 2
- Lipids 3
- Lipids 4
- Proteins 1
- Proteins 2
- Proteins 3
- Proteins 4
- Nucleic Acids 1
- Nucleic Acids 2
- Nucleic Acids 3
- Nucleic Acids 4
- Nucleic Acids 5
- Biological Molecules Problem 1
- Biological Molecules Problem 2
- Biological Molecules Problem 3
- Biological Molecules Problem 4
- Biological Molecules Problem 5
54

Biology - Enzymes and Energy
- Enzymes and Energy - Introduction FREE PREVIEW
- Structure and Function of Enzymes 1 FREE PREVIEW
- Structure and Function of Enzymes 2
- Structure and Function of Enzymes 3
- Structure and Function of Enzymes 4
- Factors Affecting Enzyme Activity 1
- Factors Affecting Enzyme Activity 2
- Control of Enzyme Activity 1
- Control of Enzyme Activity 2
- ATP as the Energy Currency of the Cell 1
- ATP as the Energy Currency of the Cell 2
- Enzymes and Energy Problem 1
- Enzymes and Energy Problem 2
- Enzymes and Energy Problem 3
- Enzymes and Energy Problem 4
55

Biology - Cellular Metabolism
- Cellular Metabolism - Introduction FREE PREVIEW
- Types of Metabolism FREE PREVIEW
- Understanding Glycolysis 1
- Understanding Glycolysis 2
- The Anaerobic Option - Fermentation 1
- The Anaerobic Option - Fermentation 2
- The Anaerobic Option - Fermentation 3
- The Aerobic Option - Cellular Respiration
- The Krebs Cycle 1
- The Krebs Cycle 2
- The Krebs Cycle 3
- The Krebs Cycle 4
- The Electron Transport Chain - ATP Harvesting 1
- The Electron Transport Chain - ATP Harvesting 2
- The Electron Transport Chain - ATP Harvesting 3
- Overall Energy Harvest
- Summary of Aerobic Respiration
- Cellular Metabolism Problem 1
- Cellular Metabolism Problem 2
- Cellular Metabolism Problem 3
- Cellular Metabolism Problem 4
56

Biology - DNA Structure and Function
- DNA Structure and Function - Introduction FREE PREVIEW
- The Function of DNA FREE PREVIEW
- The Chemical Structure of DNA 1
- The Chemical Structure of DNA 2
- The Chemical Structure of DNA 3
- The Chemical Structure of DNA 4
- The Chemical Structure of DNA 5
- Chromosome Structure 1
- Chromosome Structure 2
- RNA Structure
- Replication
- The Replication Machinery
- Leading and Lagging Strand Synthesis 1
- Leading and Lagging Strand Synthesis 2
- Leading and Lagging Strand Synthesis 3
- Proofreading and Repair
- DNA Structure and Function Problem 1
- DNA Structure and Function Problem 2
- DNA Structure and Function Problem 3
- DNA Structure and Function Problem 4
- DNA Structure and Function Problem 5
- DNA Structure and Function Problem 6
- DNA Structure and Function Problem 7
57

Biology - Viruses
- Viruses - Introduction FREE PREVIEW
- Life Cycle
- Bacteriophages 1
- Bacteriophages 2
- Animal Viruses 1
- Animal Viruses 2
- The Effect of HIV on Humans
- Viruses Problem 1
- Viruses Problem 2
- Viruses Problem 3
- Viruses Problem 4
- Viruses Problem 5
- Viruses Problem 6
58

Chemistry - Introduction
- Chemistry - Introduction FREE PREVIEW
- Matter - Introduction, Atoms FREE PREVIEW
- Elements, Compounds, Mixtures 1
- Elements, Compounds, Mixtures 2
- Dalton's Atomic Theory
- Ramifications of Dalton's Theory
- The General Structure of The Atom
- Electrons 1
- Electrons 2
- Charge of Electrons, Protons
- Neutrons
- Atomic Number and Mass Number
- Atomic Weight
- Molecules
- Molecular Weight
- Empirical Formula
- The Concept of Mole
- Example 1
- Example 2
- Composition by Percentage
- Example
- Predicting Formulas from Percentage Compositions
- Example 1
- Example 2
- Density
- Example 1
- Example 2
- Chemistry - Introduction Problem 1
- Chemistry - Introduction Problem 2
- Chemistry - Introduction Problem 3
- Chemistry - Introduction Problem 4
- Chemistry - Introduction Problem 5
- Chemistry - Introduction Problem 6
- Chemistry - Introduction Problem 7
- Chemistry - Introduction Problem 8
- Chemistry - Introduction Problem 9
- Chemistry - Introduction Problem 10
- Chemistry - Introduction Problem 11
- Chemistry - Introduction Problem 12
- Chemistry - Introduction Problem 13
59

Chemistry - Chemical Reactions
- Chemical Reactions - Introduction FREE PREVIEW
- Chemical Reactions FREE PREVIEW
- Types of Chemical Reactions - Combination Reaction
- Combustion Reaction
- Decomposition Reaction, Displacement Reaction
- Metathesis Reaction (double-replacement reaction)
- Balancing Simple Equations
- Sample Problems
- Oxidation Number 1
- Oxidation Number 2
- Oxidation Number 3
- Example
- Sample Problems
- Oxidation-Reduction Reactions 1
- Oxidation-Reduction Reactions 2
- Balancing Oxidation-Reduction Reactions - Method A
- Balancing Oxidation-Reduction Reactions - Method B
- Example - Method A
- Example - Method B
- Calculations Involving Chemical Reactions
- Example 1
- Example 2
- The Concept of Limiting Reagent
- Example
- Percent Yield
- Example 1
- Example 2
- Chemical Reactions Problem 1
- Chemical Reactions Problem 2
- Chemical Reactions Problem 3
- Chemical Reactions Problem 4
- Chemical Reactions Problem 5
- Chemical Reactions Problem 6
- Chemical Reactions Problem 7
- Chemical Reactions Problem 8
- Chemical Reactions Problem 9
- Chemical Reactions Problem 10
- Chemical Reactions Problem 11
- Chemical Reactions Problem 12
- Chemical Reactions Problem 13
- Chemical Reactions Problem 14
- Chemical Reactions Problem 15
60

Chemistry - Electronic Structure
- Electronic Structure - Introduction Atomic Structure FREE PREVIEW
- Electromagnetic Waves FREE PREVIEW
- The Wave Nature
- The Particle Nature and Quantum Theory
- Photoelectric Effect 1
- Photoelectric Effect 2
- Key Observations on Photoelectric Effect
- Atomic Emission Spectra
- Bohr's Model of Hydrogen Atom 1
- Bohr's Model of Hydrogen Atom 2
- Bohr's Model of Hydrogen Atom 3
- Quantum Numbers 1
- Quantum Numbers 2
- Quantum Numbers 3
- Electronic Configuration 1
- Electronic Configuration 2
- Electronic Configuration 3
- Electronic Configuration 4
- Examples
- Hund's Rule
- Example
- Electronic Structure Problem 1
- Electronic Structure Problem 2
- Electronic Structure Problem 3
- Electronic Structure Problem 4
- Electronic Structure Problem 5
- Electronic Structure Problem 6
- Electronic Structure Problem 7
- Electronic Structure Problem 8
- Electronic Structure Problem 9
- Electronic Structure Problem 10
61

Chemistry - Organic Chemistry
- Organic Chemistry - Introduction FREE PREVIEW
- The Carbon Atom FREE PREVIEW
- Bonding, Hybridization of Orbitals
- sp3 Hybridization
- sp2 Hybridization
- sp Hybridization
- Resonance
- Functional Groups
- Organic Chemistry Problem 1
- Organic Chemistry Problem 2
- Organic Chemistry Problem 3
- Organic Chemistry Problem 4
- Organic Chemistry Problem 5
- Organic Chemistry Problem 6
- Organic Chemistry Problem 7
- Organic Chemistry Problem 8