Additive Thinking and Mental Strategies · Term 2

Solving One-Step Word Problems

Students will solve one-step addition and subtraction word problems within 100.

Key Questions

  1. Analyze the keywords in a word problem to determine the correct operation.
  2. Construct a number sentence to represent a given word problem.
  3. Justify the reasonableness of an answer to a word problem.

Ontario Curriculum Expectations

2.OA.A.1
Grade: Grade 2
Subject: Mathematics
Unit: Additive Thinking and Mental Strategies
Period: Term 2

Suggested Methodologies

Think-Pair-Share

Individual reflection, then partner discussion, then class share-out

10–20 min

Learn more about Think-Pair-Share

RAFT Writing

Creative writing from a specific Role, Audience, Format, Topic

25–45 min

Learn more about RAFT Writing

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Planning templates for Mathematics

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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.

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Math 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.

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Math 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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Adding Two-Digit Numbers (No Regrouping)

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Subtracting Two-Digit Numbers (No Regrouping)

Students will subtract two-digit numbers using strategies based on place value, without regrouping.

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