Lesson objective: Understand that data can be represented as a picture graph.

Students bring prior knowledge of data from 1.MD.4. This prior knowledge is extended to a new data representation as students draw a picture graph where each picture represents one. A conceptual challenge students may encounter is understanding that the key represents the unit.

The concept is developed through work with voting on field day events with stickers, which helps students understanding that each vote is represented by one sticker and then one smiley face on the picture graph.

This work helps students deepen their understanding of equivalence because the data table and the picture graph both represent the same data.

Students engage in Mathematical Practice 4 (Model with mathematics) as they represent contextual quantities in a picture graph representation.

**Key vocabulary:**

- data
- greatest
- key
- least
- picture graph
- unit