Measurement is such a fun lesson to teach. Pull out a ruler and excitement buzzes through the classroom. But how do you take that excitement to mastery?

1. It is important that students understand the formulas. I have provided a lot of information below that you can share with your students/children to help build background knowledge.

2. They have to practice. I always tell my students that learning Perimeter, Area, and Volume is like multiplication facts. You need to memorize them. These formulas are ones they are going to use the rest of their lives, from building a fence to plotting furniture in a room.

### What is Perimeter?

**How do you find the perimeter?**

When finding the perimeter you add up all of the sides. Look at the images below and then read the captions.

In a square all sides are equal. If one side is 4 inches, then all of the sides
are 4 inches. To find the perimeter add 4 + 4 + 4 + 4 = 16 in. |

**Want to have students demonstrate what they have learned? Use this Performance Assessment. **

Performance Task: Create a garden, playground, or floor plan using squares and rectangles.

Differentiation:

– Have students use cubes to set the garden, playground, or floor plan. Then trace the outside of the creation. Allow students to count the sides and find it in units, rather than inches, or feet.

– Have students use precut squares and rectangles to set the stage and then trace the outside. The length of each could be measured for the students if needed.

– Have students draw the plan using rulers. Students determine if the length should be in inches or feet. They can create a key to show that each centimeter on the ruler equals another measurement.

**What is Area?**

Area is the inside of something. It is the floor, the area you use to move around. Area is measured by squares.

**How do you find the area?**

You can find area several ways.

1. Count the squares. (Look at the blue rectangle in the image above.)

2. Multiply the Length x Width (A = l x w)

**Look at the images below**

To find the area of this rectangle you can make 5 rows of 8 squares
and count them or you can multiply 8 x 5 = 40 inches squared. The squared part would be written with a little 2 by the inches. |

Since all sides are equal in a square you would have 4 rows of 4
squares. You can also multiply 4 x 4 = 16 units squared. |

This one is tricky. This will have to be divided into 2 shapes. The
square part will be 16 inches and the rectangle will be 28 inches. Then you will need to add 16 + 28 = 44 in squared. |

**Performance Task: Create a garden, playground, or floor plan using squares and rectangles.**

**Differentiation: (Take the same image drawn for perimeter and find the area) **

– Have students use cubes to set the garden, playground, or floor plan. Then trace the outside of the creation. Allow students to count the sides and find it in units, rather than inches, or feet.

– Have students use precut squares and rectangles to set the stage and then trace the outside. The length of each could be measured prior to the lesson.

– Have students draw the plan using rulers. Students determine if the length should be in inches or feet. They can create a key to show that each centimeter on the ruler equals another measurement.

**What is Volume? **

Volume is the amount of space occupied by and object.

**How do you find the volume?**

To find volume you multiply the Length x Width x Height. (V = l x w x h) Look at the examples in the image above.

**Want more practice and assessments? Click HERE! **

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