Unit 8, Lesson 2
Los compañeros hacen parejas
Grado 2
Preparation
Lesson Purpose
The purpose of this lesson is for students to pair all of the objects in a group and understand that some numbers of objects can be paired without any objects left over.
Lesson Narrative
In a previous lesson, students determined whether a group of objects could be split into 2 equal groups and discovered that for some numbers of objects, there will be 1 leftover.
In this lesson, students learn that some numbers of objects can be split into multiple groups of 2 (pairs) without any incomplete pairs. In the Lesson Synthesis, students compare the charts from this lesson and the previous lesson that show no leftovers or 1 leftover. They notice that the lists of numbers are the same. The terms even and odd are introduced and added to the charts.
Students should have access to connecting cubes or counters throughout the lesson, including the Cool-down.
- Engagement
None
- Determine whether a collection of objects can be arranged into groups of 2 (or “pairs”) with “one leftover” or “no leftovers,” and describe (orally) observations about each category.
- Formemos parejas con grupos de objetos.
Required Preparation
Activity 1
- Each group of 2 needs a container of 4 to 15 counters. Be sure to use the same containers (with the same numbers of counters) that were used in the previous lesson.
- Create a t-chart on a large piece of chart paper to display in the Activity Synthesis. Title it “Making Pairs” and label the columns “no leftovers” and “one leftover.”
Teacher Reflection Questions
What was the best question you asked students today? Why do you consider it the best one based on what students said or did?
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