How much does it cost to mail a package in Canada? What factors determine the cost of postage? If you have ever put a box in the mail at a Canada Post location, you'll notice the mail person do several things. First they put the box on a scale, then they measure the dimensions of the box with a measuring tape. Finally, they read the postal code for the destination and input it all into their computer. Then they'll tell you the price to mail it. Getting students to measure items with a variety of measurement tools is great practice to get familiar with metric and imperial measurement systems as well as becoming familiar with common measurement units. Sometimes this practice is just measuring lines on a worksheet or measuring objects around the classroom (paperclips, pencils, desks, etc.). This can seem a bit trivial. I was hunting for measurement with a purpose and thought of the measurements that postal employees do. It turns out, you can find the rate for mailing a package by using a page on Canada Post's website.
The students seemed to enjoy the activity and got some purposeful practice using metric and imperial measurements. Here is a link to the google slides for the activity and a recording sheet. NS Outcomes: Mathematics Essentials 12  1.6 Identify, use, and convert among and between SI units and Imperial units to measure and solve measurement problems Mathematics 10  M01 Students will be expected to solve problems that involve linear measurement, using SI and imperial units of measure, estimation strategies, and measurement strategies. Mathematic at Work 10  M03 Students will be expected to solve and verify problems that involve SI and imperial linear measurements, including decimal and fractional measurements. Mathematics Essentials 10  D3 estimate distances in metric units and in imperial units by applying personal referents. EL
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