Lesson 2

Tenths

Est. Class Sessions: 2–3
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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, 4.NF.C.7)

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.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make sense of structure.

Students work with base-ten pieces and metersticks to build their understanding of tenths. They represent tenths both as common fractions and as decimal fractions.

Content in this Lesson

  • Measuring length to the nearest meter and tenth of a meter [E4].
  • Representing decimals using area models, number lines, and base-ten pieces [E5].
  • Using words and numbers to read and write decimals to the tenths [E6].
  • Making connections among representations of decimals including symbols, words, area models, base-ten pieces, and number lines (metersticks) [E7].
  • Comparing and ordering decimals using models [E8].
  • Writing numbers in common fraction and decimal fraction form [E6].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
  • Tenths
    Check-In: Questions
    30–32
    Page 461
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Student Pairs

2 metersticks
base-ten pieces (2 packs, 14 flats, 30 skinnies)

Materials for the Teacher

Display of Tenths Helper page (Student Activity Book) Page 403
Unit 10 Assessment Record
meterstick
20 skinnies
additional base-ten pieces to display

Materials Preparation

Skinnies along Meterstick. To prepare for Question 1 in the Student Guide, line up ten skinnies along the side of a meterstick as shown in the opening vignette.

Assessment in this Lesson

Assessment Expectation Assessed

Tenths
Check-In: Questions 30–32
Student Guide
Page 461
E4.
Measure length to the nearest meter and hundredth of a meter (centimeter).
E5.
Represent decimals using area models, number lines, and base-ten pieces.
E6.
Use words and numbers to read and write decimals to the hundredths.
E8.
Compare and order decimals to the hundredths using models.

Grace's Base-Ten Pieces
Student Activity Book
Page 407
E5.
Represent decimals using area models, number lines, and base-ten pieces.
E6.
Use words and numbers to read and write decimals to the hundredths.
E7.
Make connections among representations of decimals including symbols, words, area models, base-ten pieces, and number lines.
E8.
Compare and order decimals to the hundredths using models.