TumbleMath 
TumbleMath is a comprehensive collection of math eBooks designed for children. The eBooks combine animation, narration and sound to create stories and teach math concepts. They are accompanied by supplementary materials such as instructional videos, educational games and quizzes to track reading progress. Designed for children of all ages, TumbleMath allows children to learn at their own pace and gives them the ability to take ownership over their reading.
Service note: TumbleMath is leaving EPL's online resource collection. Brainfuse HelpNow, Science Reference Source and Solaro all offer resources for math learning.
