**About the Session:** Do your students struggle to construct explanations and engage in argument from evidence using data? During this session, co-facilitated by Tuva and the NSTA Professional Learning Team, participants will analyze datasets to explore how explanations and arguments can be scaffolded with the CER structure. Data is central to the process of constructing a claim and selecting the strongest evidence. Participants will surface common student challenges, and identify instructional moves and prompts that strengthen claims, evidence selection, and reasoning in science instruction. **Takeaways:** Participants will learn strategies to help students construct explanations and argue from evidence using data to support clearer claims, stronger evidence selection, and more effective reasoning in NGSS-aligned science sensemaking. **Presenters:** Jocelyn Foran (Tuva Science Education Specialist) and Brianna Reilly Oliveira (NSTA Director of Professional Learning)