Khan Academy
Khan Academy: Algebra Ii: Manipulate Formulas
Manipulate multi-variable formulas to isolate specific variables in order to solve some word problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Khan Academy
Khan Academy: Manipulate Formulas
Solve multi-variable formulas for a specific variable in order to solve some word problems.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Bending Light
Manipulate variables and measure angles as light is refracted in this interactive simulation.