A powerful feature of online instruction is the ability to embed assessment throughout and capture data on how students are learning. The TAACCCT program calls on institutions to use such data to “continuously assess the effectiveness of their strategies in order to improve their program… and build evidence about effective practice.” In this interactive session, we will share the OLI approach to data driven continuous improvement. Together we will discuss strategies for using learning data to refine course materials by examining examples from our project. We will also present an overview of the learning data and tools available to co-development and Platform+ participants.