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## Math

- Euclid's Elements

Geometry.
- IXL

This site offers math practice for students in pre-K through 8th grade and for students taking Algebra I, Algebra II, Geometry, Precalculus and Calculus. IXL explains how to solve the problem if you answer it incorrectly. You can also practice math skills for the Virginia Standards of Learning exams IXL - Virginia math standards. Students may try up to 20 free practice questions per day.
- Khan Academy

Hundreds of math videos explaining topics such as basic math, algebra, geometry and calculus.
- Math is Fun

Covers a range of math topics such as basic numbers for pre-K students to calculus for high school students and explains the concepts in an understandable way. Includes a math dictionary and games.