Lesson 2

Seeing Doubles

Est. Class Sessions: 1–2
X

Mathematical Standards

1.OA.A
Represent and solve problems involving addition and subtraction. (1.OA.A.1, 1.OA.A.2)

Standards for Mathematical Practice

MP2.
Reason quantitatively.
MP4.
Model with mathematics.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.

Students create visual representations of doubling a number then create a table of doubles. The class brainstorms a list of familiar items that come in pairs then think of doubles number sentences to reflect their examples.

Content in this Lesson

  • Representing and identifying even and odd numbers.
  • Representing doubles using counters, pictures, and number sentences [E1].
  • Finding objects that come in pairs.
  • Representing addition situations using stories, drawings, counters, or number sentences [E2].
  • Showing work in pictures and in writing [MPE5].

Daily Practice and Problems E–F

E. Using Partners

F. Making Ten

X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

sheet of white paper
small amount of paint and a paintbrush or cotton swab, hole punch, or pair of scissors. See Materials Preparation.
colored paper, optional

Supplies for Student Pairs

20 connecting cubes

Materials for the Teacher

Display of 15 Doubles (Student Activity Book) Page 365
Display of Doubles Problems (Student Activity Book) Page 367–368, optional
Unit 12 Assessment Record
chart paper

Materials Preparation

Prepare Materials for Visual Representations. Each student will fold paper and use paint with a paintbrush or cotton swabs, a hole punch, or scissors to make a visual display of doubling numbers. See Part 1. Select one of the three methods best suited to your class, then gather a sufficient number of supplies as needed for each student.

Prepare Space for Classroom Display. Allocate a bulletin board or wall space on which to display visual representations of doubling numbers created by the class entitled "Doubles." A bright background will make the doubles stand out.

Assessment in this Lesson

ASSESSMENT EXPECTATION ASSESSED MATH PRACTICES EXPECTATION ASSESSED
Doubles Problems
Student Activity Book
Pages 367–368
E1.
Represent doubles, near doubles, and halves using counters, pictures, and number sentences.
E2.
Represent addition and subtraction using stories, drawings, diagrams, counters, number sentences, number lines, or ten frames.
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.

Vocabulary in this Lesson