Grade 3 measurement is about picking a sensible unit and then using it. Spatial Sense expectation E2.2 asks students to estimate, measure, and compare length, mass, and capacity, and to determine perimeter. The printable preview asks which tool measures the length of a book and about how long a new pencil is. Students convert 14 metres into centimetres, find the end time of a movie that starts at 11:45 and lasts 50 minutes, and calculate the perimeter of a rectangle 7 cm by 2 cm. A mass item asks which tool measures how heavy a backpack is. Area of trapezoids and volume of prisms are Grade 6 measurement content; this page stays with length, mass, time, and perimeter.
Ontario curriculum: Mathematics (2020) · Spatial Sense E2.2 — use appropriate units to estimate, measure, and compare length, mass, and capacity, and determine perimeter
