For more than 20 years faculty at Steward Observatory and the Department of Astronomy at the University of Arizona have been national leaders in the field of Astronomy Education Research.  Their efforts include investigating students' learning over a wide array of physical science topics taught in astronomy, astrobiology, physics, geoscience and planetary science. The results from these studies have led to new research methodologies, and new theoretical perspectives that have informed the development innovative active-learning instructional strategies shown to intellectually engage learners and significantly improve their understandings, problem solving abilities and self-efficacy related to learning about science. Additional efforts have focused on development of classroom assessment tools, educational technologies, and public outreach activities. Faculty, graduate students and undergraduate students have collaborated on the developed of a variety of education materials in support of several NASA and NSF funded science missions. Dissemination of this work has been provided through industry leading active-learning professional development workshops that have reached thousands of science educators around the world. Through their research, teaching and professional development efforts, they strive to create inclusive and equitable educational opportunities for students and professionals in STEM. For more information please visit our web site.