Lesson 4

Pocket Parts

Est. Class Sessions: 2
X

Mathematical Standards

1.NBT.A
Extend the counting sequence. (1.NBT.A.1)
1.NBT.B
Understand place value. (1.NBT.B.2)
1.OA.A
Represent and solve problems involving addition and subtraction. (1.OA.A.1, 1.OA.A.2)
1.OA.C
Add and subtract within 20. (1.OA.C.5, 1.OA.C.6)

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.
MP6.
Attend to precision.

Pockets on student clothing are used as the context for exploring part-whole relationships of numbers. The techniques used here serve as a bridge from concrete representations (pockets) to symbolic representations (numbers). Students gather data, record it, write number sentences, and discuss the part-whole relationships.

Content in this Lesson

  • Explaining a strategy for solving an addition problem [MPE5].
  • Discovering the part-whole relationship of numbers [E3].
  • Making connections between representations of quantities using connecting cubes, counters, and symbols [E2].
  • Solving addition problems using the counting-on strategy [E5].
  • Using tools (e.g., connecting cubes and counters) to solve two- and three-part addition problems whose sums are less than 20 [E7].
  • Representing addition situations with number sentences [E6].
  • Developing math facts strategies by partitioning numbers.
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

20 connecting cubes (10 of one color and 10 of another color)
ten frames
counters
desk number line (0–40)

Materials for the Teacher

Display of Shirt and Pants Pockets pages (Student Activity Book) Pages 43–44
Display of Shirts, Pants, and Coat Pockets Master (Teacher Guide)
Display of Pocket Parts Table Master (Teacher Guide)
Unit 3 Assessment Record
chart paper to display table, optional. See Materials Preparation.
class number line (0–130)

Materials Preparation

Prepare to Display a Table. Display the Pocket Parts Table Master or make a five-column data table on chart paper or the board. See Figure 1.


Figure 1: Pocket Parts Table

Prepare Optional Targeted Practice. Use the More Pocket Parts 1 and More More Pocket Parts 2 Masters to customize targeted practice for your students. Prepare several versions of these pages ahead of time so they are available for additional practice, homework assignments, assessment, or center activities. Students will need counters, connecting cubes, and number lines readily available while solving these problems.

Prepare Ten Frames. Copies of Two Ten Frames Master can be laminated for repeated use and also be made readily available to students.

Assessment in this Lesson

Assessment Expectation Assessed Math Practices
Expectation Assessed
Shirt and Pants Pockets
Observe
Student Activity Book
Pages 43–44
E5.
Solve addition problems using the counting-on strategy.
E7.
Solve addition word problems (e.g., adding to, putting together, comparing) involving two or three whole numbers whose sum is less than or equal to 20 using counters and ten frames.
How Many Pockets?
Student Activity Book
Pages 47–48
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.
Checking Pockets
with Feedback Box
Student Activity Book
Pages 49–50
E5.
Solve addition problems using the counting-on strategy.
E6.
Represent addition situations using drawings, diagrams, ten frames, counters, number lines, and number sentences.
E7.
Solve addition word problems (e.g., adding to, putting together, comparing) involving two or three whole numbers whose sum is less than or equal to 20 using counters and ten frames.

Vocabulary in this Lesson