Lesson 16
Día 3 de centros
Lesson Purpose
The purpose of this lesson is to practice working with numbers to 120 and measuring lengths.
Lesson Narrative
In the first activity, students learn stage 3 of the Counting Collections center. In this new stage, students count and represent collections of up to 120 objects. In the second activity, students choose between two previously introduced centers focused on measuring and writing numbers.
- Representation
- MLR8
Learning Goals
Teacher Facing
- Count groups of up to 120 objects and write a number to represent them.
- Measure length by iterating same-size length units without gaps or overlaps.
- Read and write numbers to 120.
Student Facing
- Practiquemos cómo contar, medir longitudes y escribir números.
Required Materials
Materials to Gather
Materials to Copy
- Counting Collections Stage 3 Recording Sheet, Spanish
Required Preparation
Activity 1:
- Create a collection of up to 120 objects per group of 2 students (buttons, two-color counters, linking cubes, paper clips, pattern blocks, square tiles).
Activity 2:
- Gather materials from:
- Write Numbers, Stages 1–3
- Estimate and Measure, Stage 1
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 20 min |
| Activity 2 | 20 min |
| Lesson Synthesis | 10 min |
Teacher Reflection Questions
Think about a time you recently made a mistake during math class. How did you leverage your mistake to show students that mistakes are just learning in process?