Lesson 1

From the Fish Hatchery

Est. Class Sessions: 2
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Mathematics Standards

4 NBT.A
Generalize place value understanding for multi-digit whole numbers. (4NBT.A.1, 4NBT.A.2, 4NBT.A.3)
4 NBT.B
Use place value understanding and properties of operaitons to perform multi-digit arithmetic.(4NBT.B.5)
4.OA.A
Use the four operations with whole numbers to solve problems. (4.OA.A.3)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP4.
Model with mathematics.
MP7.
Look for and make sense of structure.

Students extend their understanding of multiplication concepts to multiplication of 2-digit by 2-digit numbers. They use mental math, rectangles, and expanded form to find solutions.

Content in this Lesson

  • Multiplying numbers that are multiples of ten.
  • Using place value concepts and the distributive property to multiply 2-digit by 2-digit numbers [E1].
  • Showing connections between the rectangle model of multiplication and expanded form [E2].
  • Estimating products of multidigit numbers and explaining one's reasoning [E3].
  • Multiplying 2-digit by 2-digit numbers using mental math strategies, rectangle models, and expanded form [E4].
  • Demonstrating fluency with the division facts for the last six facts [E7].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Materials for the Teacher

Display of Counting Squares Pages (Student Activity Book) Pages 465–466
Unit 11 Assessment Record
Math Facts Class Record

Materials Preparation

Triangle Flash Cards. Prepare copies of the Triangle Flash Cards on heavier paper or card stock. Have students cut apart each set and store them in an envelope. You may want to provide each student with two sets, one to use at school and one to take home.

Assessment in this Lesson

Assessment Expectation Assessed
Solving Multiplication Problems
Check-In: Questions 1–4
with Feedback Box
Student Activity Book
Pages 473–475
E1.
Demonstrate understanding of the place value concepts and mathematical properties involved in multiplication of 2-digit by 2-digit numbers (e.g., use the distributive property to multiply).
E2.
Show connections between models and strategies for multiplying 2-digit by 2-digit numbers (e.g., demonstrate partial products
using a rectangle model for multiplication).
E3.
Estimate products of multidigit numbers.
E4.
Multiply 2-digit by 2-digit numbers using mental math strategies and paper-and-pencil methods (e.g., expanded form, all-partials).
E6.
Choose appropriately from among estimation, mental math strategies, and paper-and-pencil methods to multiply multidigit numbers.
DPP Item A The Last Six Facts
Teacher Guide - digital
E7.
Demonstrate fluency with the division facts related to the last six multiplication facts
(24 ÷ 4, 24 ÷ 6, 28 ÷ 4, 28 ÷ 7, 32 ÷ 4, 32 ÷ 8,
42 ÷ 6, 42 ÷ 7, 48 ÷ 6, 48 ÷ 8, 56 ÷ 7, 56 ÷ 8).

Vocabulary in this Lesson