Using Models for Addition within 100
Students use concrete models or drawings and strategies based on place value to add within 100, including composing a ten.
Key Questions
- Design a model using base-ten blocks to demonstrate regrouping when adding two-digit numbers.
- Explain how bundling ten ones into a ten rod simplifies the addition process.
- Analyze how an open number line can be used to visualize adding two-digit numbers.
Common Core State Standards
Suggested Methodologies
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Planning templates for Mathematics
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerMath Unit
Plan a multi-week math unit with conceptual coherence: from building number sense and procedural fluency to applying skills in context and developing mathematical reasoning across a connected sequence of lessons.
rubricMath Rubric
Build a math rubric that assesses problem-solving, mathematical reasoning, and communication alongside procedural accuracy, giving students feedback on how they think, not just whether they got the right answer.
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