Hands on
You will need....
Six easy to find objects with a range of weights. The milk container is about 1/2 full of water.
Weights clearly marked with weight in kg, weight in grams and the fraction of the kg and decimal.
A sheet like this.
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Big Idea
How many g in a kg (key for tomorrows activity)
Physical idea of who much a kg is
Relating fractions to weight eg - 1/2 a kg
Link .5 to 1/2 to 500g
Physical idea of who much a kg is
Relating fractions to weight eg - 1/2 a kg
Link .5 to 1/2 to 500g
Give the kids a chance to feel the bags
Then ask some discussion questions that try and draw on their fractions knowledge. Asking the same question in different ways should help them connect the 1kg=1000g which they really really need for tomorrow.
How many 100g bags to make 1000g
Which bag is twice as heavy as another?
How many 100g to make 1/2 a kg?
How many 500g to make 1kg?
How many 100g are there in 1kg?
This was something I did with the kids that you might want to do. I had the ipad on the TV so they could all see it nice and big and I got them to predict what was going to happen when the grams got over 1000.
How many 100g bags to make 1000g
Which bag is twice as heavy as another?
How many 100g to make 1/2 a kg?
How many 500g to make 1kg?
How many 100g are there in 1kg?
This was something I did with the kids that you might want to do. I had the ipad on the TV so they could all see it nice and big and I got them to predict what was going to happen when the grams got over 1000.
Rotation of objects
I had kids in groups of 4.
They sat around the class and the objects went around. Each group had the three weights shown above to help them guess the weight of each object.
Weighed each at the end on the IPAD connected to the TV.
They sat around the class and the objects went around. Each group had the three weights shown above to help them guess the weight of each object.
Weighed each at the end on the IPAD connected to the TV.