Lesson 10
Center Day 2
Lesson Purpose
The purpose of this lesson is for students to practice measuring and adding within 100.
Lesson Narrative
Students learn a new center called Estimate and Measure, where they choose an object and a length unit to measure it with. They estimate the length of the object before measuring to find the actual length. Students then choose from previously introduced centers focusing on adding within 100.
- Action and Expression
- MLR8
Learning Goals
Teacher Facing
- Add within 100.
- Measure length by iterating same-size length units without gaps or overlaps.
Student Facing
- Let’s measure the length of objects.
Required Materials
Materials to Gather
- Base-ten blocks
- Connecting cubes
- Materials from previous centers
- Objects of various lengths
- Paper clips (2-inch)
Materials to Copy
- Estimate and Measure Stage 1 Recording Sheet
Required Preparation
Activity 1:
- Gather or identify objects of various lengths that are less than 20 connecting cubes long (pencils, markers, books, glue, scissors, shoe, tape dispenser).
Activity 2:
- Gather materials from:
- How Close? Stages 1–3
- Target Numbers, Stages 1–3
- Five in a Row, Stages 1–6
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 20 min |
| Activity 2 | 20 min |
| Lesson Synthesis | 10 min |
Teacher Reflection Questions
As students worked together today, where did you see evidence of the mathematical community established over the course of the school year?