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Nelson Education > School > Mathematics K-8 > Math Focus > Grade 5 > Teacher Centre > Surf for More Math > Chapter 8 - Lesson 3

Surf for More Math


Lesson 3: Exploring Perimeter

Use these interactive activities to encourage students to have fun on the Web while learning about measurement. Students can try these activities on their own or in pairs.


Design and construct different rectangles with a given perimeter.

Builds Upon

Student Book page 263

Instructions for Use

Fence Me In is an interactive slide show that demonstrates how to find perimeter by counting the side lengths of a rectangle.

Follow the instructions on how to find the perimeter of a rectangle.


Area and Perimeter allows students to practise calculating the area or perimeter of rectangles, triangles, and irregular shapes.

Click on “Perimeter” and then click on the rectangle. Follow along with the demonstration, choose a level of difficulty, and then practise.


Perimeter Explorer allows students to practise calculating the perimeter of irregular shapes.

You will be given a shape on a grid. Calculate the perimeter, type your answer in the empty text box, and click on “Check Answer” to see if you are correct.