Lesson 1

m, dm, cm, mm

Est. Class Sessions: 2
X

Mathematical Standards

4.MD.A
Solve problems involving measurement and conversion of measurements. (4.MD.A.1)
4.NF.C
Understand decimal notation for fractions, and compare decimal fractions. (4.NF.C.5, 4.NF.C.6)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.

Students measure objects in the classroom to the nearest meter, decimeter, centimeter, and millimeter. They use decimal notation to record measurements through hundredths of a meter.

Content in this Lesson

  • Measuring lengths in metric units (to the nearest m, dm, cm, and mm) [E4].
  • Representing decimals using base-ten pieces and number lines (metersticks) [E5].
  • Reading and writing decimals to the hundredths using words and numbers [E6].
  • Understanding place value for decimals [E7].
  • Choosing the most appropriate unit of measure when measuring [E4].
X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

centimeter ruler (copy the Master if needed)
1 meter of string
scissors

Supplies for Student Groups

1 or 2 metersticks
skinnies and bits, about 10 of each

Materials for the Teacher

Display of Class Measurement Tables page (Student Activity Book) Page 399
Unit 10 Assessment Record
Math Facts Class Record
masking tape

Lesson Preparation

Prepare Meter Benchmarks. Place a piece of tape on a wall or a door 1 meter from the floor and another piece 2 meters from the floor in a location that is visible to all students. These will be used for estimating heights using the benchmarks 1 m and 2 m. Cut pieces of string one meter long, one for each student, or have students measure and cut strings at the end of Part 1.

Assessment in this Lesson

Assessment Expectation Assessed

Measure Hunt Observation
Student Activity Book
Pages 401–402
E4.
Measure length to the nearest meter and hundredth of a meter (centimeter).

DPP Item A
Triangle Flash Cards: Last Six Facts
Teacher Guide - digital
E10.
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).