The Research in Disabilities Education (RDE) program continues to advance the goal of broadening the participation of postsecondary students with disabilities in STEM. In this solicitation RDE will support two types of projects: Model Building and Broadening Participation Research in STEM Education. RDE-Model Building (RDE-MB) projects broaden the participation and achievement of postsecondary students with disabilities in STEM by creating, replicating, translating and implementing innovative educational and institutional capacity building models. RDE-Broadening Participation Research in STEM Education (RDE-BPR) projects investigate the underlying issues affecting the differential learning, participation, retention and graduation rates of postsecondary students with disabilities in STEM.