As most STEM education is based on learning progressions, long-term retention of basic information is essential when advancing to higher level coursework. Although there are many advantages to using assessments in any subject area, they are used mainly for measuring student achievement and informing both instructors and students. While evaluation of learning is an essential component of all coursework, there are several drawbacks to the traditional, individual testing scenario, including a delay in feedback. When students receive their test scores in proceeding classes they are less likely to learn from their mistakes and retain information (Bremert et al.,2020). Collaborative assessment is a strategy that serves not only as a measurement tool, but a learning tool as well. This constructivist theoretical design is useful in giving students opportunities to discuss and collaborate with their peers of varying perspectives and experiences (Siegel et al., 2015). In this presentation, we will discuss collaborative assessment as a way to improve students’ understanding and retention of key concepts in the classroom. One main takeaway from this session will be a discussion of the overall dynamics of collaborative assessment including timing, group arrangements, and scoring rubrics.