Classroom-Based Assessment in Science relate to priorities for learning and teaching such as investigating, and communicating in science, while at the same time developing students’ knowledge and understanding of science, which are vital to working like a scientist. Classroom-Based Assessments promote student engagement through choice about the topic on which to focus, communication formats and possibilities for student collaboration. In this workshop, we explored ways of supporting students to engage with the Classroom-Based Assessments in a manageable way that provides ample opportunity for student achievement, whilst keeping student choice and authentic science processes central.