Significant Digits and Tolerance

Measurement, Accuracy, and Significant Digits
Finding the Precision of a Measurement
Greatest Possible Error and Rounding Measurements

Solving Equations and Formulas

Solving One-Step Linear Equations
Solving Multi-Step Linear Equations (the second example has an error; the -1x should be -7x)

Fraction Basics
Clearing Fractions in Equations
Clearing Fractions Where the Numerator Has Two Terms
Clearing Single-Term Denominators Containing a Variable

Translating Words into Algebraic Symbols
Solving Word Problems with Linear Equations

Solving a Formula for a Particular Variable
Using a Calculator for Reciprocals

Products that Equal Zero
Solving Quadratic Equations by Factoring
Solving Quadratic Equations using the Quadratic Formula

Polynomials

Adding and Multiplying Polynomials (YouTube)

Factoring

What is Factoring?
Factoring Out a Greatest Common Factor (GCF)
Factoring Out a Negative
Factoring by Grouping
The Idea Behind Factoring Trinomials by Grouping (YouTube)
Examples: Factoring Trinomials by Grouping (YouTube)
Factoring a Difference of Two Squares (YouTube)
Factoring Perfect Square Trinomials (YouTube)


Ratios, Rates, Proportions

Ratios
Rates
Proportions

Direct Variation Using Proportions
Inverse Variation Using Proportions (On the last example, the question should be how many hours will it take 3 landscapers.)

Graphs and Equations of Lines

Introduction to the Rectangular Coordinate Plane
Graphing a Linear Equation in Two Variables by Plotting Points
Graphing a Horizontal or Vertical Line
x- and y-Intercepts of a Line

Basic Fraction Review: Zero in Fractions, Negative Fractions, Reducing Fractions (YouTube)
Finding the Slope of a Line Given its Graph
Finding the Slope of a Line Given Two Points on the Line (In one example, I copy a -3 as 3.)
Introduction to Slope-Intercept Form of a Linear Equation in Two Variables
Re-writing the Equation of a Line in Slope-Intercept Form (YouTube)
Determining the Equation of a Line Given Some of Its Properties (YouTube)
Graphing a Line With a Point on the Line and the Slope of the Line
Point-Slope Form of a Linear Equation in Two Variables
Writing the Equation of a Line That Passes Through Two Points

Solving and Graphing Quadratic Equations

Solving Quadratic Equations using the Quadratic Formula

Graphing Quadratic Equations in Two Variables by Using a Formula to Find the Vertex (YouTube)

Trigonometry

The Pythagorean Theorem

Right-Triangle Trigonometry
Using Trigonometric Functions to Find the Side of a Right Triangle
Using Inverse Trigonometric Functions to Find an Angle of a Right Triangle

Graphing Basic Sine and Cosine Equations

Law of Sines
Finding Parts of an Oblique Triangle Using the Law of Sines

Using Law of Cosines to Find an Angle

Angles in the Coordinate Plane (YouTube)
Reference Right Triangles and Trigonometric Functions (YouTube)

The Binary and Hexadecimal Number System

The Binary Number System
The Hexadecimal Number System (I did the arithmetic wrong in the example where the answer is 2727. It should be 4007.)