Pre-Algebra 
Adding Fractions (With the Same Denominator)
Adding Fractions (With Different Denominators)
Adding Positive and Negative Numbers
Dividing Fractions
Rounding to the nearest tenth
Rounding to the nearest hundredth
Multiplying Fractions
Subtracting Fractions (With the Same Denominator)

Algebra 1
The Discriminant
Factoring Quadratics 
Factoring Quadratics (Level 2)
Graphing Lines in Slope-Intercept Form (y=mx+b)
The Quadratic Formula
Solving a System Using Substitution
Solving a System Using Elimination
Solving One-Step Equations

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​Algebra 2
The Discriminant
Logarithm Rules
Solving Exponential Equations
Solving Logarithmic Equations
Solving Radical Equations

Geometry
30-60-90 Triangles
​Arc Length
​Area of a Sector
The Pythagorean Theorem
Vertical Angles