Display the class number line (0–130) where students can see and reach it with a pointer.

Attach a desk number line (0–100) to each student's desk to use throughout the year.

Display the Math Practices page where all students can see it.

Prepare Apatosaurus footprints. See Lesson 1 Materials Preparation.

Gather a collection of toy animals. See Lesson 1 Materials Preparation.

Create tape lines on the floor. See Lessons 1 and 3 Materials Preparation.

Prepare lengths of adding machine tape. See Lesson 3 Materials Preparation.

Have the following tools readily available for the Daily Practice and Problems items in this unit.

• You and your students will need:

  Triangle Flash Cards: Group E
  Addition Facts I Know charts
  20 connecting cubes
  desk number lines
  200 Charts
  coin jars from Unit 1 Lesson 1
  individual clocks
  a collection of coins
  metersticks
  yardsticks
  centimeter rulers
  12-inch rulers
  

• You will also need:

  demonstration clock
  

LESSON	SESSIONS	DESCRIPTION	SUPPLIES
LESSON 1 Measure with Nonstandard Units	2–3	Students practice measuring the length of objects using the nonstandard units of palms and footprints. Students compare measurements to examine the relationship between the size of a unit and the number of units in a measurement. They practice using good measurement techniques.	drawing paper scissors rulers tape masking tape chart paper small self-adhesive notes Actual Size by Steve Jenkins
LESSON 2 Measure with Standard Units: Short Lengths	1–2	Students practice measuring the length of objects using inches and centimeters. Students compare measurements to examine the relationship between the size of a unit and the number of units in a measure. They practice using good measurement techniques.	toy animals 12-inch rulers centimeter rulers chart paper
LESSON 3 Measure with Standard Units: Long Lengths	1–2	Students measure longer lengths using standard units: yards, feet, centimeters, and meters. They compare measurements to examine the relationship between the size of a unit and the number of units in a measure.	12-inch rulers yardsticks metersticks masking tape
LESSON 4 Estimate Length	1–2	Students estimate linear measurements using standard units: inches, centimeters, feet, yards, and meters. Students discuss strategies for estimating various lengths and select appropriate units to measure the length.	12-inch rulers centimeter rulers self-adhesive notes yardsticks metersticks adding machine tape masking tape chart paper Actual Size by Steve Jenkins
LESSON 5 Palm Variation	1	Students use a line plot and table to analyze the variation in palm sizes. They use this data to solve problems and choose a standard size for a palm.	centimeter ruler small self-adhesive notes chart paper
LESSON 6 Rolling Along in Centimeters	3–4	The Adventure Book story "Mine is the Best: The Challenge" sets the context for a TIMS Laboratory Method investigation in which students measure the length toy cars roll using centimeters. After collecting and recording data for three rolls, students find the median distance rolled then graph and analyze their data.	crayons or colored pencil chart paper metersticks ramps blocks or books toy vehicles masking tape or small self-adhesive notes