"The Ants Go Marching" Lesson Plan
By introducing multiplication and division as inverse operations, this third-grade lesson stresses the importance of teaching for understanding. The plan includes an essential question that provides the overarching purpose of the lesson and measurable objectives that align directly with the standards and assessment anchors. Several accommodations provide ways to help students of varying academic levels meet these objectives. For example, the lesson plan gives opportunities for input from a learning support teacher.
Furthermore, the lesson includes engaging activities for the students. A story introduces the topic and shows that reading can be integrated across the curriculum. As students hear the story, they connect it to their prior knowledge of multiplication. Then, the teachers use questioning that prompts students to relate this understanding to division. Next, the students model the reciprocal process by forming groups that represent different problems, creating arrays, and writing number sentences. Both teachers guide this process. After the students have received enough scaffolding through guided practice, they apply their knowledge as they complete a worksheet in pairs. The worksheet requires each pair to create its own story problem. The students then construct an array, write a repeated addition number sentence, write a multiplication number sentence and its inverse, and draw a factor triangle to represent the problem. This activity serves as the assessment for the lesson because the students must demonstrate each action listed in the objectives.
This lesson plan and its accompanying pages are posted below. Click on the following links to view a larger version of the lesson plan and the worksheet:
These ants were cut out to form arrays in the grid below.
The following pages comprise the worksheets used for guided and independent practice.