Lesson 1

Lizardland Problems

Est. Class Sessions: 1–2
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Mathematical Standards

3.OA.A
Represent and solve problems involving multiplication and division. (3.OA.A.1, 3.OA.A.2, 3.OA.A.3)
3.OA.B
Understand properties of multiplication and the relationship between multiplication and division. (3.OA.B.5)
3.OA.C
Multiply and divide within 100. (3.OA.C.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.
MP6.
Attend to precision.

Students solve problems involving multiplication by using clues they find in a drawing of the Lizardland Amusement Park. They write and solve their own multiplication problems about the drawing.

Content in this Lesson

  • Representing multiplication problems with number lines, drawings, and number sentences [E1, MPE5].
  • Using appropriate and efficient strategies to solve multiplication problems [E2, MPE2].
  • Reading problems carefully to find what information is important [MPE1].
  • Using labels to explain solutions and strategies [MPE6].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide

Teacher Resources

 Teacher Guide - digital

Supplies for Students

calculator
counters or connecting cubes
desk number line (0–100)
envelope for flash cards
drawing paper, optional

Materials for the Teacher

Display of Math Practices (Student Guide) Reference
Unit 8 Assessment Record
Math Facts Class Record
chart paper for student displays
counters

Materials Preparation

Subtraction Flash Cards. Flash Cards were prepared and distributed in Units 2–5. If needed, use the Masters provided in Unit 6 to prepare two-sided copies of the flash cards for each group. Students should cut them apart and store them in an envelope.

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed

Lizardland Problems
Check-In: Questions 8–9
Student Guide
Page 193
E1.
Represent multiplication and division problems with number lines, drawings, rectangular arrays, and number sentences.
E2.
Use strategies to solve multiplication and division problems (e.g., skip counting, repeated addition, repeated subtraction, reasoning from known facts, and invented).
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 A
Subtraction Flash Cards: Groups 5 and 6
Teacher Guide - digital
E10.
Use mental strategies to subtract for the facts in Groups 5–8.

Vocabulary in this Lesson