Unit Plan

Addition and Subtraction


Grade Levels

Related Academic Standards

Assessment Anchors

Eligible Content

Big Ideas




Students will learn reasoning strategies for basic addition and subtraction facts, including student-initiated strategies. Students will learn computation strategies based on flexible use of tens and number facts, including student-initiated strategies. Students will:

  • use their understanding of number combinations to develop fluency in the use of basic facts for addition and subtraction.

  • develop and use strategies for solving simple story problems, including problems with money.

  • develop and use strategies for whole-number computation with a focus on addition and subtraction of multidigit numbers, with and without regrouping.

  • use a variety of methods and tools to compute and estimate sums and differences of quantities and conclude the reasonableness of the result.

Essential Questions

  • What strategies and models can we use to understand how to solve an addition or subtraction problem?

Related Unit and Lesson Plans

Related Materials & Resources

The possible inclusion of commercial websites below is not an implied endorsement of their products, which are not free, and are not required for this unit.

  • Elementary and Middle School Mathematics: Teaching Developmentally by Van de Walle. Heinemann, 2009.

  • Journal for Research in Mathematics Education, 39(2), 153–183. Henry & Brown, 2008.

Formative Assessment


  • Current Rating





This lesson would be great for a second grade class. However, one should not simply use the formal assessment as it would be very difficult for some learners. With this being said, one can easily modify the assessment to fit his/her classroom dynamic. This should always be a precaution. Most people that adopt a lesson plant, fail to adapt the lesson plan. Adoption requires adaptation when speaking in terms of instruction and lessons.

Posted more than a year ago
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