ILC 3rd Grade Mathematics: Unit 7 Two-dimensional Shapes and Perimeter

This is unit 7 of 8 units. The sequence of units is available in the Read Me First Materials in each unit. 

• Section A: Reason with Shapes 
  In this section, students will describe, compare, and sort a variety of shapes. Students will think about ways to sort triangles and quadrilaterals into more specific categories based on their attributes. Students will see that triangles and quadrilaterals can be classified and named based on their sides (whether some sides are the same length) and angles (whether they have right angles). Students will see that a shape can have more than one name if it has the attributes that define different shapes. 
• Section B: What is Perimeter? 
  In this section, students will learn that the perimeter is the distance around a shape. Students will draw shapes with a specified perimeter and see that different shapes can have the same perimeter. 
• Section C: Expanding on Perimeter 
  In this section, students will solve problems that involve both area and perimeter. Students will draw rectangles with the same area and different perimeters, and rectangles with the same perimeter and different areas. 
• Section D: Design with Perimeter and Area 
  In this section, students will apply what they have learned about geometric shapes, perimeter, and area to solve design problems.