Lesson 5
Add Within 50
Lesson Purpose
The purpose of this lesson is for students to add within 50. Students find the value of sums within 50 in any way that makes sense to them.
Lesson Narrative
Students added within 100 in grade 1. This lesson serves as a formative assessment of how students find the value of sums with larger addends. Throughout the lesson, monitor for students who look for and make use of the structure of place value to add tens to tens and ones to ones (MP7).
Math Community
Tell students that, at the end of the lesson, they will be asked to reflect on the norms and they can add norms about working with a partner.
- Representation
- MLR8
Learning Goals
Teacher Facing
- Add within 50 in a way that makes sense to them.
Student Facing
- Let’s add within 50.
Required Materials
Materials to Gather
Materials to Copy
- How Close? Stage 3 Recording Sheet
Required Preparation
Activity 2:
- Create connecting cubes in towers of 10 and singles.
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 20 min |
| Activity 2 | 15 min |
| Lesson Synthesis | 10 min |
| Cool-down | 5 min |
Teacher Reflection Questions
In what ways is the math community you are working to foster going well? What actions can you take to continue to build community?
Suggested Centers
- Number Puzzles: Addition and Subtraction (1–4), Stage 1: Within 10 (Supporting)
Print Formatted Materials
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| Student Task Statements | docx | |
| Lesson Cover Page | docx | |
| Cool Down | Log In | |
| Teacher Guide | Log In | |
| Teacher Presentation Materials | docx | |
| Blackline Masters | zip |