Measurement
Length, mass, capacity, area, perimeter and volume, with real tools and units.
Lessons
Measure It: Length, Time and Mass in the Real World
Whose foot is the right ruler? How long is a minute, really? Is a kilogram of feathers lighter than a kilogram of rocks? Four lessons where students measure length, time and mass with real tools, then use their own data to settle an argument.
Fence It, Fill It: Area and Perimeter
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.
Online practice
- Flat or solid shapes Grade R
- Count the sides of flat shapes Grade R
- Count the faces of solid shapes Grade R
- Which is longer or shorter Grade R
- Compare lengths Grade 1
- Length in units from zero Grade 1
- Answer questions about a data table Grade 1
- Length from a ruler that does not start at zero Grade 2
- How much longer Grade 2
- Add lengths Grade 2
- Jump on a number line Grade 2
- Answer questions about a data table Grade 2
- Convert metres and centimetres Grade 3
- Convert centimetres and millimetres Grade 3
- Area of rectangles Grade 3
- Area of squares Grade 3
- Area from rows of unit squares Grade 3
- Perimeter of rectangles Grade 3
- Perimeter of squares Grade 3
- Find a missing side from the area Grade 3
- Find a missing side from the perimeter Grade 3
- Area of shapes made from two rectangles Grade 3
- Add and subtract masses in grams Grade 3
- Add and subtract masses in kilograms Grade 3
Free tools
Area and Perimeter Builder
Draw shapes on a square grid and watch the area and perimeter count up. Challenges ask for shapes with the same area but different perimeters.
Measurement Converter
Convert length, mass, volume, temperature and time between metric and imperial units, with the working shown and a sense-of-size picture for each.