Rocket Math offers reasearch-based curriculum materials. Rocket Math is run by Don Crawford who has had many roles using and supporting effective, research-based instructional practices and curriculum materials. His passion is helping teachers acquire and hone the tools and skills necessary to help their students achieve successful outcomes. Rocket Math and the products that support it, are his first products. Don is so proud to be able to make them available because THEY WORK! He has new products in development and looks forward to bringing them to you very soon. Be on the lookout for new curriculum materials to help you help the students whose lives you touch. - See more at: http://www.rocketmath.com/