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 Senior Infants
- Count the sides of flat shapes Senior Infants
- Count the faces of solid shapes Senior Infants
- Which is longer or shorter Senior Infants
- Compare lengths First Class
- Length in units from zero First Class
- Answer questions about a data table First Class
- Length from a ruler that does not start at zero Second Class
- How much longer Second Class
- Add lengths Second Class
- Jump on a number line Second Class
- Answer questions about a data table Second Class
- Convert metres and centimetres Third Class
- Convert centimetres and millimetres Third Class
- Area of rectangles Third Class
- Area of squares Third Class
- Area from rows of unit squares Third Class
- Perimeter of rectangles Third Class
- Perimeter of squares Third Class
- Find a missing side from the area Third Class
- Find a missing side from the perimeter Third Class
- Area of shapes made from two rectangles Third Class
- Add and subtract masses in grams Third Class
- Add and subtract masses in kilograms Third Class
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.