Lesson objective: Solve problems with scaled graphs.

This lesson provides an opportunity for students to apply their knowledge and understanding of interpreting graphs to a real-life situation. Students are asked to determine how many wristbands can be made from a given number of beads.

Depending on students' proficiency with multiplication and analyzing scaled graphs, teachers may want to consider swapping the order of this lesson and Lesson 10 in this unit. While this lesson is intended to serve as a bridge between scaled picture graphs and scaled bar graphs, some teachers may feel that their students will be better able to access this task after some practice working with scaled bar graphs in Lesson 10.

Key Concept students will use:

- Picture graphs and bar graphs can have scales other than one.

Skills students will use:

- Exploring equal groups as a foundation for multiplication and division (Grade 3, Unit 1)
- Multiplying one-digit numbers by multiples of 10
- Finding, extending, and explaining patterns

Students engage in Mathematical Practice 3 (Construct viable arguments and critique the reasoning of others) as they explore different ways to approach and solve the task of discovering how many wristbands of each color can be made.

**Key vocabulary: **

- data
- graph
- scale