Short Blocks

# Maths Year 1/2 Spring Measures and Data

Each unit has everything you need to teach a set of related skills and concepts.

## Compare and measure weight(suggested as 2 days)

### 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.

### You Will Need

• Items to weigh: large pebble, potato, bag of potatoes, cotton wool, books
• Bucket balance scales
• Kitchen scales
• 1kg weight, 100g weights, 1g weights
• ‘Heavier and lighter’ (see resources)
• ‘Comparing Weights’ recording sheet (see resources)
• ‘Weighing Tins’ activity sheet (see resources)
• A selection of objects to weigh, e.g. books of different sizes, bag of potatoes, bag of rice or sugar (weighing exactly 1kg), bag of apples
• 2 large sheets of paper
• Marbles, wooden bricks (or similar uniform objects)
• Fruit and vegetables, including an apple
• Tins of food with the weight on the labels covered
• Flapjack ingredients

### Short Mental Workouts

Day 1
Estimating and comparing

Day 2
Left and right

### Worksheets

Day 1
Y1: Compare weight of common items using own experience.
Y2: Sort objects into categories by weight: <100g and >100g.

Day 2
Y1: Determine the weight of objects on scales, balanced with bricks. Answer questions relating to weight.
Y2: Record weight by counting 100g weights on balance scales; classify as <500g or >500g.

### Mastery: Reasoning and Problem-Solving

Y1

• Which is heavier:
(i) A potato or a pebble?
(ii) A book or a shoe?
(iii) A soft toy or a paint pot?
Use a bucket balance to find out.
• Sometimes, always, never true...
-- A book is the same weight as 12 marbles
-- A shoe is heavier than a sock?
-- A big handful of cotton wool is lighter than three 50p coins?
• Weigh two of your favourite books using wooden bricks. Write their weight. Which weighs more?

Y2

• Does each item weigh more or less than 100g?
-- A ruler
-- A hard-boiled egg
Check using a balance scale.
• How many 100g weights balance 1 kilogram?
• Match each object to one of the weights:
tin of beans
bag of sugar
grapefruit
feather
box of books
--
1 gram
3 kilograms
400 grams
1 kilogram
200 grams

In-depth investigation: Ten to the kilo
Children use estimation and accurate measurement skills to find exactly ten items which weigh precisely one kilogram.

### Extra Support

Y1: Ups and downs
Compare weights by direct comparison

Y2: Be the Balance
Compare weights by direct comparison