Lesson 1

Contemos y sumemos

Lesson Purpose

The purpose of this lesson is for students to count objects and relate counting to addition. 

Lesson Narrative

Students revisit counting collections, which is an activity introduced in kindergarten. Students count and represent objects in a way that makes sense to them. Students then count dots on two dot cubes to find the total. Together, they relate counting to addition, as the teacher writes expressions to represent the total number of dots on the two cubes (MP2). A 10-frame is provided as a blackline master. Students used 10-frames in kindergarten and may choose to use them throughout this section. Consider making copies on cardstock or laminating them so they can be used repeatedly.

Throughout the lesson, observe students for the look fors on the Section A Checkpoint Assessment, which can be used throughout the section.

Math Community

In the lesson synthesis, students discuss  what it means to be a part of a mathematical community. Prepare a space, such as a piece of poster paper, titled “Comunidad matemática” // “Math Community”​ ​and a T-chart with the header “Hacer matemáticas” // “Doing Math.”​ ​Partition the column into two sections: students and teacher.

  • Engagement
  • MLR8

Learning Goals

Teacher Facing

  • Count and represent a collection of objects.
  • Relate counting to addition.

Student Facing

  • Contemos objetos.

Required Materials

Materials to Gather

Materials to Copy

  • Counting Collections Stages 1 and 2 Recording Sheet, Spanish
  • 10-Frame Standard
  • Number Race Stage 3 Gameboard

Required Preparation

Activity 1:

  • Create one collection of up to 20 objects such as buttons, counters, connecting cubes, paper clips, square tiles for each group of 2.

CCSS Standards

Building On


Building Towards

Lesson Timeline

Warm-up 10 min
Activity 1 20 min
Activity 2 20 min
Lesson Synthesis 10 min
Cool-down 0 min

Teacher Reflection Questions

Reflect on the tone in the classroom during the first lesson of the year. How are you feeling about teaching math, and how are your students feeling about participating in the mathematics this year? How can you tell?

Print Formatted Materials

Teachers with a valid work email address can click here to register or sign in for free access to Cool Down, Teacher Guide, and PowerPoint materials.

Student Task Statements pdf docx
Lesson Cover Page pdf docx
Teacher Guide Log In
Teacher Presentation Materials pdf docx
Blackline Masters zip