1. This second 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 one of the numbers and then counting up from the other number incrementally. (Third Grade Standard 3.NBT.A.2).
For example: 87 + 55 =
87 + 50 = 137 (Students can count up as 97, 107, 117, 127, and 137)
137 + 5 = 142
3. Third grade students will model their solutions on number lines, explore the commutative and associative properties of addition, and will explain any strategies used.
4. These Lesson Plans also include practice problems that assist with the earlier skills of counting up by tens and hundreds from any number up to 900. (Second Grade Standard 2.NBT.B.8).
5. Fourth grade students use the traditional method of addition, but should be familiar with the methods used in the earlier grades. (Fourth Grade Standard 4.NBT.B.4).
6. These Lesson Plans include word problems and templates that allow teachers to modify and create additional practice problems for students.