Lesson 5

Button Solutions

Est. Class Sessions: 2
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Mathematical Standards

2.NBT.A
Understand place value. (2.NBT.A.1, 2.NBT.A.3)
2.OA.A
Represent and solve problems involving addition and subtraction. (2.OA.A.1)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in
solving them.
MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP7.
Look for and make use of structure.

Students solve word problems with buttons or connecting cubes and show their solutions. They use the Math Practices page in the Student Activity Book to assess their work and provide feedback to other students.

Content in this Lesson

  • Representing and solving addition and subtraction problems using counters, number lines, ten frames, drawings, and number sentences [E6].
  • Solving word problems (e.g., join, separate/take away, part-whole, compare) involving two whole numbers whose sum is within 100 [E7].
  • Solving problems involving money.
  • Representing and identifying quantities using groups of counters and symbols [E1].
  • Using efficient grouping strategies to count a collection of objects [E3].
  • Reviewing and evaluating their own thinking and the thinking of others.
  • Showing how a problem was solved so thinking is clear to others [MPE5].
  • Using labels in a solution and answer to a problem [MPE6].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

connecting cubes or buttons

Materials for the Teacher

Display of the Math Practices page (Student Activity Book) Reference
Display of Button Collection Master (Teacher Guide)
Display of Jackie’s Work Master (Teacher Guide)
Display of Jerome’s Work Master (Teacher Guide)
Display of Grace’s Work Master (Teacher Guide)
Unit 2 Assessment Record
Math Facts Class Record
Unit 2 Individual Assessment Record
Display set of coins
class number line (0–130) or prepared Number Line Display Masters from Lesson 1
chart paper. See Materials Preparation.

Materials Preparation

Prepare a “Ways to Make $1.00” chart. Display and title a piece of chart paper “Ways to Make $1.00.”

Assessment in this Lesson

ASSESSMENT EXPECTATION ASSESSED MATH PRACTICES EXPECTATION ASSESSED
Button Solutions
with Feedback Box
Student Activity Book
Pages 95–96
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.
MPE6.
Use labels. I use labels to show what numbers mean.
Ming’s Buttons
with Feedback Box
Peer Assessment
Student Activity Book
Pages 97–98
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.
MPE6.
Use labels. I use labels to show what numbers mean.
DPP Item P
Addition Practice with Tens
Teacher Guide - digital
E11.
Demonstrate fluency with the addition facts with sums to ten in Group C
(1 + 9, 2 + 7, 2 + 8, 3 + 6, 3 + 7,
4 + 6, 5 + 5).
E12.
Use math fact strategies to add (direct modeling, counting strategies, reasoning from known facts) for the facts with sums more than 10 in Group C (2 + 9, 3 + 8, 4 + 7, 5 + 6).
DPP Item R
Other Facts
Teacher Guide - digital
E12.
Use math fact strategies to add (direct modeling, counting strategies, reasoning from known facts) for the facts with sums more than 10 in Group C (2 + 9, 3 + 8, 4 + 7, 5 + 6).

Vocabulary in this Lesson