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Units Three and Four

Unit 3: Linear Measures and Area

  The first three lessons of Unit 3 have students define units of measure by pacing off distances, creating a common unit for the class based on averages and then using US customary and metric units to measure lengths. The remainin lessons of Unit 3 extend work on perimeter and area begun in previous grades. They also begin exploring the value of pi by exploring the relationship between diameter and circumference. Unit 3 has four main areas of focus:
~explore the need for standard units of measure
~measure lengths using customary and metric units
~develop the concept of area
~investigate the relationship between diameter and circumference

Unit 4

3.1 "A Class Shoe" Unit of Length

Discuss the need for standard units of measure and to guide children as they create a unit of length (class shoe) and measure with it.

3.2 Measuring with a Ruler

Children measure line segments to the nearest inch, half-inch, quarter-inch, centimeter, half-centifmeter and millimeter.

3.3 Standard Linear Measures

3.4 Perimenter

3.5 Pattern Block Toss Experiment

3.6 Exploring Perimeter and Area

3.7 Area

3.8 Number Models for Area

3.9 Diameter and Circumference

3.10 Progress Check 3