Wikipedia
ExploreLearning
ExploreLearning is a Charlottesville, Virginia-based company which operates a large library of interactive online simulations for mathematics and science education in grades 3–12. These simulations are called Gizmos. The company's website describes their library of over 450 Gizmos as the world's largest collection of such materials.
ExploreLearning also makes Reflex Math, which is an online, game-based system that helps students of all ability levels to develop instant recall of basic math facts (addition, subtraction, multiplication, and division).
ExploreLearning is a business unit of Cambium Learning Group .