The National Library of Virtual Manipulatives
1000s of practice problems, step-by-step examples, graphs galore, and real-world applications of algebra.
We have more explanations than you can shake a stick at, hilarious-yet-accurate graphical depictions of tricksy algebra concepts, and practice problems at no cost.
Schmoop Algebra II
Time to become familiar with matrices, the quadratic formula, logarithms, and even get an introduction to the building blocks of (gasp!) precalculus.
Homework Help - Algebra
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Online Algebra activities
Algebra and Geometry
Presentations, worked examples and simulations on Algebra and Geometry.