Reading Apprenticeship is a research-based professional learning model and instructional framework designed by the Strategic Literacy Initiative (SLI) at WestEd to improve student literacy and learning. Based on understandings of the close relationship between curricular reform and professional development (Heller & Greenleaf, 2007), Reading Apprenticeship components include an instructional framework and associated professional development model for secondary and post-secondary teachers across the academic subject areas. In 2015, the U.S. Department of Education awarded SLI a Supporting Effective Educator Development (SEED) grant to disseminate the Reading Apprenticeship approach to literacy instruction across the subject areas in middle and high schools. The funded project, called Reading Apprenticeship Across the Disciplines (RAAD), was awarded in October 2015 and concluded in October 2019. Through RAAD, SLI served middle and high school teachers in 6 states (California, Illinois, Michigan, New York, Texas, and Wisconsin). Three key goals shaped the RAAD project: (1) Increase the number of highly effective secondary teachers serving high needs students by providing Reading Apprenticeship professional learning; (2) Improve high needs students' reading comprehension, academic achievement, metacognitive skills, and positive learning dispositions by increasing opportunities to learn; and (3) Build local capacity for strong and sustained implementation and dissemination of effective academic literacy practices through teacher leader development, school, and regional network support. An independent impact study was conducted by IMPAQ International with 7% of participating sites to address project Goals 1 and 2. This report focuses on formative assessment of project activities that address SLI's capacity to accomplish project Goals 1 and 3. [For the impact study, "Evaluation of Reading Apprenticeship across the Disciplines (RAAD): Effective Secondary Teaching and Learning through Literacy Leadership," see ED622055.]