Teacher Education Materials Project (TE-MAT) : A Database for K-12 Professional Development Providers The TE-MAT (Teacher Education Materials) Project was funded through a National Science Foundation (NSF) grant to Horizon Research, Inc. (HRI) to develop an online resource to support professional development providers as they work to enhance the capacity of pre-service and in-service teachers to provide high-quality K-12 mathematics/science education. Susan Snyder, Warren Beasley, and Kathryn Chval have served as NSF program officers for this project. with developmentdvdsmathprofessionalsciencete-matvideos