Unit Plan

Addition and Subtraction Are Related


Grade Levels

Related Academic Standards

Assessment Anchors

Eligible Content

Big Ideas




This unit uses story problems to help students develop strategies for learning basic addition and subtraction facts and for computation using one- and two-digit numbers. Students are encouraged to demonstrate their thinking processes in computation, using a variety of methods and tools, including objects, pictures, number lines, and counting forward or backward. Students will:

  • select and use appropriate operations to solve story problems.
  • demonstrate multiple addition and subtraction strategies to solve single- and double-digit problems.
  • use what they know about addition to help them with subtraction.

Essential Questions

  • How can expressions, equations and inequalities be used to quantify, solve, model, and/or analyze mathematical situations?
  • How are relationships represented mathematically?

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Formative Assessment


  • Current Rating





The unit and lesson plans provide wonderful examples, ideas, and assessments to help first graders learn how to represent numbers in different ways! The related lessons are helpful in breaking down the information and supporting the understanding of number representations. I specifically like how hands-on manipulatives are used. The formative assessments in this lesson can easily be modified to provide students with many examples for representing numbers in different ways.

Posted more than a year ago
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