Answer: Claim-Evidence-Reasoning or CER is a writing strategy that can be of three parts: a claim, the evidence, and the student's reasoning. It should include an explanation of the underlying science concept. This section is organized around 4 elements of scientific argumentation that students need extra support with: 1) Evidence, 2) Reasoning, 3) Student Interaction, and 4) Competing. Claims. Reasoning always lays out how a piece of evidence—either a fact or an example from the text—supports your claim. If you just give evidence and reasons without reasoning, you give the reader the opportunity to interpret the evidence however he or she wants. Hope this helps you!
