### Planning and Activities

**Day 1**

Put a potato in one side of a bucket balance and a pebble in the other side. Explain that the heavier object makes the balance go down on that side. Let children ‘be a balance’, like a see-saw, with arms outstretched. Pass round 100g weights. Children suggest things which are lighter and things which are heavier.

**Group Activities: T with Y1**

Y1 -- Compare objects to the weight of a book, finding objects heavier and lighter. Some children will order the objects from *lightest* to *heaviest.*

Y2 -- Compare everyday objects with 100g and 1kg weights.

**Day 2**

Put an apple on one side of a balance scale, then put marbles on the other until the scale balances. Count the marbles. Draw a pictogram. Repeat with other objects.

**Further Teaching with Y2**

Explain the need for standard measures. Show 1kg, 1g and 100g weights. Weigh a shoe in 100g steps.** Group Activities: T with Y2**

*Use the ‘Ten to the kilo’ in-depth problem-solving investigation below as today’s group activity.*

Or, use these activities:

Y1 -- Use bricks to estimate and weigh different pieces of fruit/vegetables.

Y2 -- Weigh items, such as cooking ingredients, to the nearest 100g.