CSAwesome is a new approved curriculum and professional development (PD) provider for the Advanced Placement (AP) Computer Science (CS) A high school course. AP courses are taken by secondary (typically ages 14-19) students for college placement and/or credit. CSAwesome's free curriculum and teacher resources were developed in 2019 by adapting the CSA Java Review ebook on the open-source Runestone platform. The goals of CSAwesome are to broaden participation in the AP CSA course and to support new-to-CS students and teachers as they transition from the AP Computer Science Principles (CSP) course to the AP CSA course by using inclusive teaching practices and curriculum design. The AP CSP course is equivalent to a first course for non-majors at the college level, while the AP CSA course is equivalent to a first course for majors. Currently, AP CSA attracts a much less diverse student body than AP CSP. This new curriculum supports student engagement and scaffolded learning through an interactive ebook with embedded executable and modifiable code (Active Code), a variety of practice types with immediate feedback, and adaptable mixed-up code (Parsons) problems. Collaborative learning is encouraged through pair programming and groupwork. Our pilot Professional Development (PD) incorporates inclusive teaching strategies and active recruitment with the goal of broadening participation in CSA. This paper presents the design of the CSAwesome curriculum and teacher professional development and initial results from the curriculum use and pilot PD during the first year of CSAwesome.