• I can order three objects from shortest to longest

• I can compare two objects that cannot be moved by using a third object to carry the length

• I can say which of two objects is longer after comparing each of them to the same third object

• I can use the words longer, shorter, longest and shortest correctly

• I can say why lining up at the same starting point matters

Success Criteria

Lesson 1: Introducing Length

We are learning to compare and order lengths, including lengths that cannot be placed side by side.

• I can use a balance to find which of two objects is heavier

• I can say what a level balance tells me

• I can order three objects from lightest to heaviest using a balance

• I can predict which object is heavier and then check with the balance

• I can give an example of a large object that is lighter than a small one

Success Criteria

Lesson 2: Introducing Mass

We are learning to compare and order masses using a balance.

• I can find which of two containers holds more by filling one and pouring it into the other

• I can order three containers by how much they hold

• I can use the same cup each time when I count how many cups fill a container

• I can recognise that a taller container does not always hold more

• I can say why using different sized cups would make the comparison unfair

Success Criteria

Lesson 3: Introducing Capacity

We are learning to compare and order how much containers hold, using one filler throughout.

• I can lay units end to end along an object with no gaps and no overlaps

• I can start the first unit at the end of the object

• I can count the units and say the length as a number of those units

• I can recognise that the count means nothing unless every unit is the same

• I can say why a measurement with gaps gives a number that is too small

Success Criteria

Lesson 4: Measuring Length

We are learning to measure length by repeating a single unit end to end with no gaps and no overlaps.