In this unit students work at a variety of stations involving practical measuring tasks. Estimation skills and the ability to measure accurately using kilograms and grams are developed.
Students' measurement experiences must enable them to:
This unit builds on students personal benchmarks and provides students with the opportunity to extend their understanding of the units of mass by exploring measurement tasks within everyday contexts.
This unit provides an opportunity to discuss strategies that can be used to solve comparison problems.
In the activities at the stations students are asked to estimate and then measure the weights of a variety of objects. Encourage students to work out the difference between their estimate and the actual measurement, and then ask them about this.
Students may count on or back, or they may be able to use partitioning strategies. For example:
Prior to this unit, students need to have plenty of experience developing benchmarks for measures. Units such as Making Benchmarks - Mass provide opportunities for this. They should also have been introduced to reading simple scales.
In this station students fill up boxes and containers from everyday grocery items, estimating their weight according to the information on the packet. They check their estimations by measuring.
Choose a box or packet to work with.
Record your work in a table.
Packet |
Original Weight |
My Estimate |
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In this station students estimate then measure the weight of different parcels to be sent in the post.
Pricing and Information
Service |
Delivery |
Price per Unit (incl GST) |
NATIONWIDE - Post |
1-3 day delivery |
$2.50 up to 500g |
$2.95 up to 1kg |
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NATIONWIDE - FastPost |
Next Day |
$3.10 up to 500g |
$3.50 up to 1kg |
Record your work on a table like this.
Box |
Estimated Weight |
Actual Weight |
Price to Post |
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In this station students fill up bags with grocery items from the bulk bins, estimating their weight according to a shopping list. They check their estimates by weighing the bags.
For example:
Shopping list
200g red lentils
300g brown lentils
150g kidney beans
500g chick peas
In this station students estimate the weight of everyday grocery items. They weigh the items to check their estimates then compare the actual weight with the weight stated on the packaging. Make sure you put masking tape over the weights of the products to encourage estimation.
Record your work on a table like this.
Item |
Estimated Weight |
Measured Weight |
Weight as stated on packaging |
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In this station students measure ingredients accurately to make Lolly Cake.
Make Lolly Cake using this recipe. Be sure to measure your ingredients carefully!
Lolly Cake
Ingredients:
120 g butter
250 g malt biscuit crumbs
180 g fruit puffs
1/2 tin condensed milk
coconut – for coating
Method:
Dear Family and Whānau
This week at school we are practising using kilograms and grams to weigh things. We are also interested in how these measures are used in everyday life. Could you please help by showing us when you are using kilograms and grams to measure things and where this information is on packages?
Printed from https://nzmaths.co.nz/resource/weighing-stations at 11:06pm on the 4th May 2024