Lesson 7

Exploring the Number Line

Est. Class Sessions: 2
X

Mathematical Standards

2.MD.B
Relate addition and subtraction to length. (2.MD.B.6)
2.OA.A
Represent and solve problems involving addition and subtraction. (2.OA.A.1)
2.NBT.A
Understand place value. (2.NBT.A.1)
2.NBT.B
Use place value understanding and properties of operations to add and subtract. (2.NBT.B.7)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in
solving them.
MP2.
Reason quantitatively.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP7.
Look for and make use of structure.
MP8.
Look for and express regularity in repeated reasoning.

Students compare the number line to the 200 Chart. They identify patterns and moves on the 200 Chart and represent them on the number line. They play Moving on the Number Line, a game involving adding and subtracting on the number line.

Content in this Lesson

  • Identifying, describing, and using patterns on 200 Charts and number
    lines [E1].
  • Connecting representations of quantities greater than 100 using number lines, 200 Charts, and number sentences [E2].
  • Representing addition and subtraction using number sentences, number lines, or 200 Charts [E3].
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Book

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

desk number line (0–100)
game marker

Supplies for Student Pairs

clear plastic spinner or a paper clip and pencil

Materials for the Teacher

Display of 200 Chart (Student Activity Book) Reference
Display of Patterns on the 200 Chart Master (Teacher Guide)
Display of Number Lines 0–30 (Student Activity Book) Pages 145–146
Display of Moving on the Number Line (Student Activity Book) Pages 147–152
Display of Sample Moving on the Number Line Recording Sheet (Teacher Guide)
Unit 3 Assessment Record
class number line (0–130)

Materials Preparation

Prepare Optional Targeted Practice. Make copies of the Moving on the Number Line pages from the Student Activity Book to place in a learning center. Students will also need a spinner or a paper clip and pencil and game markers.

Assessment in this Lesson

Assessment Expectation Assessed
Number Line Moves
Student Activity Book
Pages 153–154
E2.
Connect representations of quantities using number lines, 200 Charts, and number sentences.
E3.
Represent addition and subtraction using multiple representations (e.g., stories, drawings, diagrams, counters, number sentences, number lines, 200 Chart).