# Lesson 12

¿Cuántos?

### Lesson Purpose

The purpose of this lesson is for students to answer “how many in each category” and “how many in all” questions about data and explain their thinking.

### Lesson Narrative

In previous lessons students made statements about categorical data based on representations of the data. In this lesson they answer questions about data using two different representations, tally marks and numbers. The different representations provide students with different entry points into solving Put Together problems based on data. Students discuss how different representations can be helpful in different ways to answer questions about categorical data. Since students only added within 10 in kindergarten, connecting cubes should be made available as students solve Put Together problems within 20.

In this lesson, students collect data from a survey question. In order to keep the total number of data points within 20, break the class into two groups, Group A and Group B. In Activity 1, collect data from Group A and in Activity 2, collect data from Group B.

Blackline masters with survey data are provided for those classes who are unable to collect their own data.

• Representation
• MLR2

Activity 2: Datos representados con números

### Learning Goals

Teacher Facing

• Answer “how many in each category” and “how many in all” questions about data represented in different ways.

### Student Facing

• Respondamos preguntas sobre datos.

### Required Materials

Materials to Gather

Materials to Copy

• Data Represented with Tally Marks, Spanish
• Data Represented with Numbers, Spanish

Building On

Building Towards

### 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

Identify ways the math community you are working to foster is going well. What aspects would you like to work on? What actions can you take to improve those areas?