1. This first set of Lesson Plans for Standards 3.NBT.A.2 and 4.NBT.B.4 covers the addition of whole numbers using a strategy that increases students' understanding of place value.
2. Third grade students add whole numbers by expanding each number and adding each place separately. (Standard 3.NBT.A.2) For example:
348 + 236 =
300 + 200
40 + 30
8 + 6
= 500 + 70 + 10 + 4 = 584
3. Fourth grade students use the traditional method of addition, but should be familiar methods used in the earlier grades. (Standard 4.NBT.B.4)
4. These Lesson Plans include practice with expanding numbers, number lines, word problems, and templates that allow teachers to modify and create additional practice problems for students.