Pre-algebra is more than just a set of math topics—it’s the bridge between basic arithmetic and the deeper logic of algebra. Mastering it builds the confidence and skills needed for high school math, ...

(CBS News) Sal Khan is a math, science, and history teacher to millions of students, yet none have ever seen his face. Khan is the voice and brains behind Khan Academy, a free online tutoring site ...

A large-scale study of over 200,000 U.S. students found that even minimal annual use of Khan Academy’s mastery-based math program correlated with measurable test score improvements. Researchers noted ...