Illustrative Mathematics
Level A
Unit: Numbers and Operations and Algebraic Thinking
Lesson 1.4.13 Addition and Subtraction Centers (Multiples of 10, Within 20, Represent a Collection)
Lesson topic: Addition and subtraction within 20
Instructor Materials
- Teacher Guide
- Slides
- Level A Centers: Check it Off stages 1-3, Five in a Row: Addition and Subtraction stages 1-4, Grab and Count stage 2, How Close? stages 1&2, Number Puzzles stages 1&2, Shake and Spill stages 3-5
- CCRS Standard: 1.NBT.4, 1.NBT.5, 1.NBT.6, 1.OA.5, 1.OA.6, 1.OA.8
- Learning goal: Add and subtract within 20. Add tens to two-digit numbers. Count and represent a collection.
- 1.4 Assessment and Practice Problems
Student Materials
Get the free download of Adobe Acrobat Reader.