Real world, mathematics-based educational activities provide context for learning and break down barriers to learning in mathematics and science. SpaceMath@NASA (hereafter SpaceMath) provides teachers with real-world math activities in a space context in support of standards, by using current NASA discoveries as a starting point for motivating students to develop and use mathematics skills. The reach and efficacy of SpaceMath in supporting NASA's STEM mission was examined through an analysis of the resources and website data, a survey of a subset of listserv members, data from workshop attendees - new users of SpaceMath, and a comparison group study. SpaceMath has been used by millions of educators who consistently report that SpaceMath aligns with what they teach, that they can immediately apply what they have learned in workshops, and are able to use it in their classes. Educators report that students enjoy the application problems and topics, are productively engaged, and ask questions that demonstrate curiosity and interest. Use of SpaceMath to teach science concepts and apply math skills provides a context that enhances student understanding.