Content in Context SuperLessons (C2SL) is a math and science partnership teacher professional development program focused on supporting 3rd – 8th grade teachers’ mastery of the new math and science standards (Common Core State Standards for Mathematics and Next Generation Science Standards) and implementing them with project-based learning in partnership with STEM professionals. The project is currently in its first of three years; the project aims to include 70 teachers representing all 16 districts in Lane County, OR in order to support wide dissemination of the STEM project-based learning approach.