lesson 5

Share Zoo Lunches

Est. Class Sessions: 2
X

Mathematical Standards

2.OA.A
Represent and solve problems involving addition and subtraction. (2.OA.A.1)
2.OA.B
Add and subtract within 20. (2.OA.B.2)
2.OA.C
Work with equal groups of objects to gain foundations for multiplication. (2.OA.C.4)
2.G.A
Reason with shapes and their attributes. (2.G.A.2)

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.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.
MP8.
Look for and express regularity in repeated reasoning.

This lesson focuses on fair share or division situations. Students use a variety of tools and strategies to solve partitive and measurement division problems. They are introduced to the division number sentence and to the division sign (÷).

Content in this Lesson

  • Representing multiplication and division problems using tiles, drawings, number lines, rectangular arrays, and number sentences [E2].
  • Solving multiplication and division problems using strategies (e.g., skip counting, repeated addition) with tiles, drawings, number lines, rectangular arrays, and number sentences [E7].
  • Dividing a set of objects into equal-size groups [E8].
  • Knowing what is important to solve a problem [MPE1].
  • Finding an efficient strategy for solving a problem [MPE2].
  • Showing or telling how to solve a problem [MPE5].
  • Using labels to show what numbers mean [MPE6].
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Book

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

30 connecting cubes
desk number lines (0–100)

Materials for the Teacher

Display of Sharing Problems Master (Teacher Guide)
Display of Lunchtime at the Bird House (Student Activity Book) Pages 623–624
Display of Equal Shares at the Reptile House (Student Activity Book) Pages 625–626
Display of Math Practices (Student Activity Book) Reference
Unit 12 Assessment Record
Math Facts Class Record
chart paper. See Materials Preparation.

Materials for the Teacher

Prepare Strategies and Tools Chart. Use chart paper to create a chart divided into two sections: “Strategies and Tools for Multiplication Problems” and “Strategies and Tools for Sharing Problems.” See Figure 1.




Figure 1: Sample strategies and tools for solving multiplication problems


Assessment in this Lesson

ASSESSMENT EXPECTATION ASSESSED MATH PRACTICES EXPECTATION ASSESSED
Zoo Kitchen Problems
with Feedback Box
Student Activity Book
Pages 627–629
E2.
Represent multiplication and division problems using tiles, drawings, number lines, rectangular arrays, and number sentences.
E7.
Solve multiplication and division problems using strategies (e.g., skip counting, repeated addition) with tiles, drawings, number lines, rectangular arrays, and number sentences.
E8.
Divide a set of objects into equal-size groups.
MPE1.
Know the problem. I read the problem carefully. I know the questions to answer and what information is important.
MPE2.
Find a strategy. I choose good tools and an efficient strategy for solving the problem.
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 O
Subtraction Facts Quiz 1: Group D
Teacher Guide - digital
E9.
Demonstrate fluency with the subtraction facts related to the addition facts in Group D (6 − 3, 7 − 3, 7 − 4, 8 − 4, 9 − 4, 9 − 5,
12 − 6, 13 − 6, 13 − 7, 14 − 7, 15 − 7,
15 − 8, 16 − 8, 19 − 10, 19 − 9, 20 − 10).
DPP Item Q
Subtraction Facts Quiz 2: Group D
Teacher Guide - digital
E9.
Demonstrate fluency with the subtraction facts related to the addition facts in Group D (6 − 3, 7 − 3, 7 − 4, 8 − 4, 9 − 4, 9 − 5,
12 − 6, 13 − 6, 13 − 7, 14 − 7, 15 − 7,
15 − 8, 16 − 8, 19 − 10, 19 − 9, 20 − 10).