• #### Introduction

##### Test Prep›AP US History›The AP US History Test
Introduction to AP U.S. History with Bil Johnson.
• #### Introduction

##### Test Prep›AP US Government›The AP US Government Test
Introduction to AP U.S. Government with Chuck Raznikov.
• #### Introduction Paragraph

##### English›Writing›Parts of an Essay
Tips for writing effective introductory paragraphs.
• #### Introduction to Imaginary Numbers - Problem 6

Introduction to complex numbers.
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• #### Introduction to Matrices - Problem 1

##### Math›Algebra 2›Matrices
Introduction to matrices, including naming, columns and rows, and how to write a system of equations in matrix form
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• #### Introduction to Sequences - Problem 4

##### Math›Algebra 2›Sequences and Series
Introduction to geometric sequences, how to find the ratio r, and how to tell if a number pattern represents a geometric sequence.
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• #### Introduction to Sequences - Problem 4

##### Math›Precalculus›Sequences and Series
Introduction to geometric sequences, how to find the ratio r, and how to tell if a number pattern represents a geometric sequence.
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• #### Introduction to Imaginary Numbers - Problem 5

Introduction to imaginary numbers.
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• #### Introduction to Systems of Equations - Problem 4

##### Math›Algebra›Solving Systems of Equations
Introduction to reading a graph that represents a word problems and has more than one line
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• #### Introduction to Exponents - Problem 4

##### Math›Algebra›Exponents
Negative and fractional bases in simplifying exponential expressions.
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• #### Introduction to Exponents - Concept

##### Math›Algebra›Exponents
How to interpret exponential expressions.
• #### Introduction to Sequences - Concept

##### Math›Algebra 2›Sequences and Series
How to define a sequence.
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sequence
• #### Introduction to Sequences - Concept

##### Math›Precalculus›Sequences and Series
How to define a sequence.
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sequence
• #### Introduction to Polynomials - Problem 3

##### Math›Algebra 2›Polynomials
Evaluating polynomials of higher degree for given input values.
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• #### Introduction to Probability - Concept

##### Math›Algebra 2›Combinatorics
How to calculate the probability of an event.

• #### Introduction to Exponents - Problem 3

##### Math›Algebra›Exponents
Connecting evaluating with exponents to the order of operations and addressing common errors with exponents and negative signs.
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• #### Introduction to Functions - Problem 4

##### Math›Algebra 2›Functions
Determining whether a relation is a function from maps, tables, and graphs using the vertical line test.
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• #### Introduction to Functions - Concept

##### Math›Algebra 2›Functions
How to define a function.
• #### Introduction to Functions - Problem 5

##### Math›Algebra 2›Functions
Operations on functions, including adding, subtracting, multiplying and dividing f(x) and g(x).
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