Lesson objective: Apply the counting on strategy to add data into an organized data set.

This lesson provides an opportunity for students to apply their knowledge and understanding of counting on to a real-life situation. Students are asked to organize a mixed jar of jellybeans into two jars of a single color and count on to find how many jellybeans are in each jar as a result.

Key Concept students will use:

- We can use counting to add because counting on
*n*more is the same as adding*n*more.

Skills students will use:

- Organizing data into two categories.
- Representing the new data in a picture and table.
- Using the counting on strategy to add to an amount.
- Creating number sentences to model counting on to add.

Students engage in Mathematical Practice 4 (Model with mathematics) as they as they organize and add data, modeling the addition in number sentences.

**Key vocabulary: **

- add
- count on
- data set
- data table
- organize
- represent
- sum
- total

**Special materials needed:**

- counters (optional)