Free Teacher Implementation Toolkit
Claim–Evidence–Reasoning
Learn the strategy → Plan → Teach → Assess → Reflect
Editorial draft · Administrator review pending. General educational guidance; examples are illustrative, not student records. No research outcome or placement is guaranteed.
Strategy at a Glance
- Grade bands
- K–2 / 3–5 / 6–8
- Subjects
- Math, Reading, Writing, Science, Social Studies, STEM
- Preparation time
- 20 minutes (pick a question and data or source set)
- Teaching time
- 45–60 minutes; reuse the organizer across units
Learning purpose
Students learn to separate a claim, the evidence that supports it and the reasoning that connects them, then evaluate and revise their own explanations in science, social studies and mathematics.
Materials
- A question with available data, sources or a math problem
- CER organizer (student page 1–2)
- Evidence evaluation checklist
- CER rubric and revision sheet
Skills developed
- Constructing an arguable claim
- Evaluating evidence quality
- Explaining scientific, historical or mathematical reasoning
- Revising after critique
Why this works for gifted learners
NAGC's differentiation guidance emphasizes complex reasoning and adjusting tasks to readiness. CER makes reasoning visible, so teachers can see whether a student needs better evidence, a clearer concept or a stronger connection — and ready students can be pushed to weigh counterevidence rather than complete more problems.
Sources & further reading
The sources below inform the general guidance. Classroom examples and planning steps are original illustrative suggestions, not findings from a research trial.