2.NBT.9 Explaining Addition and Subtraction Strategies


Total Pages: 40
File Size: 1 MB


This standards-based place value unit focuses on the Common Core math standards 2.NBT.9. This asks students to explain why addition and subtraction strategies work. There are daily lesson plans, whole group activities, partner practice activities, MATH group centers, exit slips, and assessments.

What’s included in the 2 daily lesson plans:

  • Whole group activity
  • Partner practice activity
  • MATH group: Math writing, Apply new skills, Teacher time, Hands-on math
  • Exit slip

(Other units within this domain are 3-5 lessons. This particular unit only provides 2 lesson plans since the skill will be practiced heavily throughout many of the other units in the domain.)

2.NBT.3 Focus:
–Day 1- Explanation and writing practice
–Day 2- Explanation and writing practice

Explain why addition and subtraction strategies work, using place value and the properties of operations.

The 2.NBT.9 activities that are included in my short answer, centers, printables, and interactive notebooks are similar, but have all been changed to fit these lesson plans. The short answers have different prompts and are now part of MATH groups, the printables & interactive notebooks have been updated and are used during the ‘Apply new skills’ part of MATH groups.

Want more CCSS math units?
>>Extra Regrouping Unit


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