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

Attach a desk number line (0–40) to each student’s desk to use throughout the year.

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

Gather a c ollection of pennies for Lesson 1.

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

• You and your students will need:
  

  Addition Flash Cards: Group D (Teacher Guide)
  12-inch ruler
  20 connecting cubes or counters
  square-inch tiles
  number lines
  pennies, nickels, and dimes
  

• You will also need:
  

  a bag of counters or beans
  

LESSON	SESSIONS	DESCRIPTION	SUPPLIES
LESSON 1 Find Area with Pennies	1	Students build a conceptual understanding of area by estimating the relative areas of cloud pictures filling each using a nonstandard unit (pennies) then counting the pennies. They also compare clouds in terms of length and width.	pennies sheets of paper beans, cubes, or counters, optional
LESSON 2 Goldilocks and the Three Rectangles	1–2	In this lesson, students continue to explore different aspects of size among two-dimensional figures. They begin by listening to an extension of the story “Goldilocks and the Three Bears.” Then they measure the height and width of the story’s three rectangles in inches and their area in square inches.	square-inch tiles scissors 12-inch rulers
LESSON 3 How Much Area	1	Students find the areas of various shapes by covering them with square-inch tiles. This activity provides many opportunities to observe students’ work.	square-inch tiles
LESSON 4 Unit Designs	1–2	Students continue to find the area of figures using square units. They practice grouping and counting skills and use addition strategies to find the area of irregular shapes.	square-inch tiles
LESSON 5 Compare	1	Students continue to compare quantities, such as length and area, and are introduced to the symbols representing “greater than,” “less than,” and “equal to.”	connecting links chart paper, optional