Begun in 2001, the Instructional Architect (IA) at USU is a digital library service that helps educators quickly and easily find and assemble NSDL resources into learning activities for their students. Since 2004, use of the IA has been embedded in a teacher technology professional development (TPD) model (DLconnect). The model is implemented as face-to-face and online workshops, and has involved several thousand K-12 teachers in several states. Extensive evaluation studies have consistently documented positive teacher impacts the workshops and tools along three critical dimensions: attitudes (teachers are overwhelmingly positive about the NSDL’s and IA’s potential), knowledge (teachers’ knowledge significantly improves), and behaviors (teachers use the IA and NSDL in their classrooms).