This article was reviewed by Anne Schmidt and by wikiHow staff writer, Johnathan Fuentes. Anne Schmidt is a Chemistry Instructor in Wisconsin. Anne has been teaching high school chemistry for over 20 years and is passionate about providing accessible and educational chemistry content. She has over 9,000 subscribers to her educational chemistry YouTube channel. She has presented at the American Association of Chemistry Teachers (AATC) and was an Adjunct General Chemistry Instructor at Northeast Wisconsin Technical College. Anne was published in the Journal of Chemical Education as a Co-Author, has an article in ChemEdX, and has presented twice and was published with the AACT. Anne has a BS in Chemistry from the University of Wisconsin, Oshkosh, and an MA in Secondary Education and Teaching from Viterbo University.
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When scientists make claims about our world, they justify those claims by citing evidence and explaining their reasoning. “Claim, Evidence, Reasoning,” a.k.a. “CER,” is the backbone of science. Learning how to write a CER paragraph is crucial to thinking like a scientist—not to mention, doing well in science class. This article will teach you how to come up with a claim, collect evidence, and provide your reasoning for a CER. We’ll even provide example sentences to get you started. Keep reading to learn how to draft a CER for your science class.