E2.9: Use square centimetres (cm²) and square metres (m²) to estimate…

Fence It, Fill It: Area and Perimeter Grades 3–4 · partly supports this outcome

Which mat is really the biggest? Does the same fence always hold the same garden? Can the same rug need more edging? Four lessons where students tile, stretch rope and chalk the schoolyard to find out that area and perimeter measure different things.

• Which mat is the biggest? 50–60 min

  Teams cover three taped mats with sticky notes and find that the long, thin mat that looks biggest is the same size as a small square one. Students explain area as the number of unit squares that cover a shape, and find it faster by multiplying rows by columns.

• Does the same fence always hold the same garden? 50–60 min

  Teams stretch the same 12 m rope loop into different rectangles in the schoolyard and find that a fence of the same length can hold 5, 8 or 9 square metres. Students find perimeter by adding the sides, find area by multiplying, and recommend a shape for a school garden.

Printable practice for E2.9

• Fence It, Fill It: Area and Perimeter workbook included with the unit

  1 word wall, 1 English-support page, 1 practice page, 1 reading, 1 unit review, 1 unit test, with answer keys.

• Grade 3 Ontario Math: Spatial Sense printable pack

  1 activity, 1 practice page, 1 assessment, with answer keys. Free sample.

• Grade 3 Common Core Math: Geometry and Measurement printable pack

  2 practice pages, 1 activity, 1 assessment, with answer keys. Free sample.

Need just this outcome? Build a custom pack from these pages, with its answer key, in about a minute. Custom packs come with All-access and school licences.