Lesson 4

Magic Squares

Est. Class Sessions: 2

Teacher Notes

6. Possible story: There are 25 students in class. Nineteen are wearing sneakers. Six are wearing boots.

Possible strategy: I counted on using tens. 19 + 1 = 20; 20 + 5 = 25; and 1 + 5 = 6. 19 + 6 = 25.

Ongoing Assessment

Use DPP item P to assess students' abilities to represent addition strategies [E2].

Write a story for the following number sentence. Show or tell how you solve the problem.

25 = 19 +