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Claim, Evidence, Reasoning (CER) is a powerful framework that helps students develop critical thinking skills. A claim is a statement that answers the question. Evidence includes scientific data or observations that support the claim. Reasoning explains why the evidence supports the claim using scientific principles.

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Comment your answer below...

What is Phoebe's claim? What is her evidence? What is her Reasoning?

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Phoebe Makes Ross Doubt Evolution | Friends

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Please take a moment to complete our quick survey about CER implementation in your classroom:

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Do you feel you need more practice with CER?

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Would you commit to doing 3+ CER this year?

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Would you commit to doing 1-2 CERs this year?

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Transform regular MC questions into CER opportunities:
1. Have students select their answer (Claim)
2. Circle evidence from the text/problem (Evidence)
3. Write why this evidence led to their choice (Reasoning)
This works great as a review pre or post test

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Page Keeley's formative assessment probes are perfect for CER! They reveal student thinking and misconceptions while providing a structured way to make claims based on scientific understanding. Try 'Is It Living?' probe with your class!

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Probes are intrinsically interesting questions that reveal what all students are thinking, uncovering initial ideas and misconceptions about core concepts and familiar phenomena that students bring to their learning. Teachers can now access digital versions of the popular formative assessment probes found in the bestselling NSTA Press series Uncovering Student Ideas. Loaded with classroom-friendly features you can use immediately, each digital probe integrates with Google Classroom and is available in both English and Spanish. The detailed Teacher Notes that accompany each probe include current research summaries, new instructional suggestions, and related NSTA resources.

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STEMscopes already includes CER in many of its investigations! Look for the 'Claim-Evidence-Reasoning' sections in the student journals. These provide excellent scaffolding for scientific thinking.

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STEMscopes NGSS Science Curriculum | Phenomena-Based 3-D STEM Learning | Accelerate Learning

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STEMscopes NGSS 3D uses the 5E plus intervention and acceleration learning model to provide an engaging STEM curriculum organized into customizable bundles. Available in a digital format, enhanced by print materials, and brought to life through exploratory hands-on kits, our blended curriculum helps students understand STEM content using the three dimensions of the NGSS.

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CER works great with math word problems!
Claim: Your solution
Evidence: The numbers and operations you used
Reasoning: Why these operations solve the problem
This connects beautifully with Common Core math practice standards!

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CER aligns perfectly with text-based evidence in ELA!
Claim: Theme or main idea
Evidence: Quotes from the text
Reasoning: How the quotes reveal the theme
This supports close reading strategies!

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Teach students how to analyze and reason using data tables.
- What question did we answer?
- How should we organize the data?
- What patterns might help us make claims?
This builds both science and math skills!

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Use CER to analyze graphs:

Claim: What does the graph tell us?

Evidence: Specific data points or trends

Reasoning: Why these trends occur

Start with simple bar graphs and work up to line graphs!

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Please share your creative ideas for implementing CER in your classroom! Comment below with a Brief description of your CER activity! Take your time to look through some options in STEMscopes, past unit test questions that need review, exit slip ideas in the unit plans, or come up with your own!
Let's build our teacher toolkit together! 🌟

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Comment your answer below!
Question: Which plant will grow taller - one in sunlight or one in shade?

Claim: The __________ plant will grow taller.

Evidence: __________________________________________________________________________________________.

Reasoning: __________________________________________________________________________________________.

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Can you think of any other generator ideas?

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Can you think of any other generator ideas?

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Comment your responses below!

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Moon and Tide CER

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I’m thinking CER structure could be used for persuasive writing planning. Anyone try that?

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Reasoning: Salt lowers the freezing point of water by interfering with the formation of ice crystals. Dissolved salt ions hinder water molecules from bonding as solid ice, thus requiring colder temperatures to freeze, a process known as freezing point depression.

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‘Possible Check-ins’ included in the assessment column of each APS unit plan or by Grade level:  Grade 3, Grade 4 & Grade 5

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Get access to files anywhere through secure cloud storage and file backup for your photos, videos, files and more with Google Drive.