Making a physical pie chart in three ways

Pie charts are an awesome way of linking statistics, fractions and angles, however they can often be difficult for students to really understand. Here are a few simple ideas to get started on developing an understanding of how pie charts work before you do any measuring of angles.

People Graph

Divide your class into groups according to an attribute (e.g., short, long or medium length hair).

Form lines for each group. Join the lines together, forming a circle.

Use chalk to draw lines on the ground, and record the fractions.

Block graph

Ask students to each choose a block of their favourite colour from somewhat limited options.

Arrange the blocks to form a circle for a pie chart, or to form a column graph by arranging in lines from a baseline.

Record the fractions.

Receipt Roll Graph

Divide your class into categories. Use a strip of paper (such as receipt roll), with 1cm for each student in your class. Divide strip into the categories, with 1cm for each student in each category. Tape the ends together,  draw lines and record the fractions.

Finally… make a protractor to link fractions and angles

Start with a circle and give instructions for students to work out where some of the degree markings would be on a protractor. Demonstrate folding in half and recording 0 and 180. Ask students what they could do from here.

Remember to check out the recorded webinar on Connecting degrees, length and time in the Long Content Videos section for website members.

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