**Weight - first and second class **

Content for first class

*The child should be enabled to*

- Estimate, compare, measure and record weight using non-standard units?

*Heavy, heavier, heaviest; light, lighter, lightest; use a balance.*

Sort objects into heavy or light by hand.

Find objects that are lighter or heavier than given object.

Estimate comparative weight of two objects by sight.

Compare weights by hand weighing.

Check using balance. - Select and use appropriate non-standard measuring units and instruments.

*Choose a measuring unit from a selection available in the classroom,*

e.g. selecting either stones, cubes or beads to weigh school bag.

Discuss which units are best for weighing various objects? - Estimate, measure and record weight using standard unit (the kilogram) and solve simple problems?

*Discuss the need for standard units?*

Collect sets of objects lighter than, heavier than or the same weight as a kilogram.

Find the largest packet and the smallest packet that weighs a kilogram.

Make two objects (two balls of Plasticine) weigh the same.

Content for second class

*The child should be enabled to*

- Estimate, compare, measure and record weight using non-standard units?
- Select and use appropriate non-standard measuring units and instruments
- Estimate, measure and record weight using kilogram half kilogram and quarter kilogram and solve simple problems?

*Measuring with pan balance, kitchen scales, bathroom scales.*

How many kilograms do you weigh?

Graph the weights of a group of children. - Explore and discuss instances when objects or substances that weigh 1 kg vary greatly in size?

*Fill bags or containers with 1 kg of sand, flour, polystyrene strips, beads.*