What this lesson teaches
Addition concept.
Add small numbers using stones or buttons!
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Addition concept.
Concrete-Pictorial-Abstract (CPA) sequencing — starting with physical objects — is the most researched and validated method for building durable mathematical understanding. Students who skip the concrete stage often develop fragile arithmetic skills that fail under novel problem formats.
1. Place 3 stones. 2. Add 2 more. 3. Count all. 4. Write 3+2=5. 5. Try 5 combinations.