Lesson 12
Center Day 2 (optional)
Lesson Purpose
The purpose of this lesson is for students to practice organizing data and using graphs to represent it. Students also practice adding and subtracting within 10, 20, or 50.
Lesson Narrative
This lesson is optional because it is an opportunity for extra practice that not all classes may need. In Activity 1, students learn stage 2 of the Sort and Display center, which was first introduced in grade 1. In this new stage, called Picture or Bar Graphs, students sort 20–30 objects into 3 categories and make a picture or bar graph that shows how they sorted. In Activity 2, students choose between two previously introduced centers focused addition and subtraction.
Learning Goals
Teacher Facing
- Practice adding and subtracting within 10 or 20.
- Practice adding within 50.
- Represent data using picture and bar graphs.
Student Facing
- Let’s sort a collection and make graphs to represent it.
Required Materials
Materials to Gather
Materials to Copy
- Sort and Display Stage 2 Recording Sheet
Required Preparation
Activity 1:
- Each group of 2 needs a collection of 20–30 objects that could be sorted into at least 3 categories. Examples: pattern blocks, cubes, sets of books, or a combination of blocks, cubes, and counters.
Activity 2:
Gather materials from :
- What's Behind My Back, Stages 2 and 3
- How Close, Stages 1–3
- Number Puzzles, Stages 1 and 2
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 20 min |
| Activity 2 | 20 min |
| Lesson Synthesis | 10 min |
Teacher Reflection Questions
Reflect on how comfortable your students are asking questions of you and of each other. What can you do to encourage students to ask questions?