andymath

First type- operations with negative numbers and absolute value
 * ThatQuiz Practice
 * Understanding Square Roots Khan Academy Video

Second type
 * Factoring Practice
 * Simplifying Algebraic Fractions Khan Academy Video
 * Division of polynomial by monomial Khan Academy Video

Third type
 * Equation solving with the Dutch applet Practice (use Safari)
 * Solving inequalities Khan Academy Video
 * Solving quadratic equations Khan Academy Video