Khan Academy
Khan Academy: Interpret Units in Formulas
Determine the appropriate unit of a quantity based on a formula containing that quantity. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Quadratic Formula
Solve quadratic equations using the quadratic formula. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Cool Math
Coolmath: Sequences With Formulas
Explanation and examples of using a formula to determine the nth term in a sequence.
Cool Math
Coolmath: Solving Quadratics Recap
This CoolMath resource reviews the ways to solve quadratic equations: factoring, finding square roots, and using the quadratic formula.