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Nelson Education > School > Mathematics K-8 > Math Focus > Grade 4 > Teacher Centre > Surf for More Math > Chapter 8 - Lesson 7

Surf For More Math


Lesson 7: Counting Square Units

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.


Compare and order areas by counting square units.

Builds Upon

Student Book page 285

Instructions for Use

Area Explorer allows students to demonstrate an understanding of area of regular and irregular shapes.

To use Area Explorer, look at the shape on the grid. Count how many squares are coloured and use that to determine what the shape’s area is. Type your answer into the white box and click “check answer” to see if it is correct. Click on “Draw New Shape” to see another shape on the grid. If you want to try working with a larger shape, increase the number for the shape’s perimeter.

Calculate the Area of a Rectangle allows students to determine and record area.

To use Calculate the area of a Rectangle, read the instructions and then scroll down the page to the Practice section. Click on the “Start” button and read the measurements in the first white box. Type the area into the second white box and click “Check” to see if it is correct. If it is, a new set of measurements will appear in the first box. If not, the correct answer will pop up.