Max by wanghonghx

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									Scales available on the program



Max               Interval          Weights available
      10                 1              1 x9, 2 x4, 5 x2, 10 x1

      100             1,2,5,10           1 x9, 2 x4, 5 x3, 10 x5,
                                              50 x2, 100 x1

      200            2,4,10,20           1 x9, 2 x4, 5 x3, 10 x5,
                                              50 x4, 100 x2

      500           5,10,25,50           1 x9, 2 x4, 5 x3, 10 x5,
                                             50 x4, 100 x3

      1000         10,20,50,100          1 x9, 2 x4, 5 x3, 10 x5,
                                          50 x2, 100x3, 500 x1



Important : limitations of the program
1. The Measuring Scales ITP uses only whole numbers so is not suitable for demonstrating mixed units e.g 3kg 500g

2. Weights are only labelled as a whole number. Teachers will need to refer to fractions of a kilogram verbally.

3. Take care in the mass you choose when asking comparison/difference type questions. There is a limited number of each weight available and this means children
will be involved in exchanging. For example Try: scale 100 interval 1, find the difference between 52kg and 39kg by removing 39kg from a scale pan holding 1 x 50kg
and 2 x 1kg. The purpose of the task will effect your choice of mass for the children to work with.


Maximum scales and intervals in the ITP function section are suggestions only. Teachers should select appropriate scales and intervals for the ability of their class.
Activities are written as though the teacher is demonstrating but it is understood that pupils will be invited to add weights, hide pointers etc.
Year 4                                                Spring Term                                                 NNS section 6 p 86, 90, 92, 94,
Objectives                                            Key questions                                               Using the ITP functions
Measure and compare using kilograms and grams,        Add 72kg to the pan scale. Approx how much does             Set the scale to 100 interval 10
and know and use the relationship between them.       Mr Smith weigh to the nearest 10kg?                         Click the + sign to the right of the appropriate weights
      1   1    3    1
Know /4, /2, /4 and /10 of 1 kg in grams.             He goes on a diet and loses 6 kg? Approx how                Click the - sign to the right of the appropriate weights
                                                      much does Mr Smith weigh now to the nearest
Suggest suitable units and equipment to estimate or   10kg?                                                       Set the scale to 200 interval 10
measure mass.                                                                                                     Click the + sign to the right of the 10kg weight.
                                                      A large bag of potatoes weighs 10kg. Where will             Use the left pointing arrow (bottom left) on the scales to
Read scales.                                          the pointer be if I buy 5 bags of potatoes?                 move the arrow pointer to 10kg so that children have a
                                                                                                                  point of reference when you start to add extra weights to
Vocabulary                                                                                                        the pan.
Mass; big, bigger, small, smaller, balances                                                                       The down pointing arrow will send the pointer back to 0
Weight: Heavy/light, heavier/lighter,
heaviest/lightest
Weigh, weighs                                                                                                     Set the scale to 1000 interval 100
Kilogram (kg) half-kilogram, gram (g)                                                                             Click the + sign to the right of the 100g weight
Balance, scales,                                                                                                  Change the interval to 50
                                                      Can you count the grams as I add 100g to the pan
                                                      each time? What is happening?
                                                      Can you count the grams as I add 50g to the pan             Click the black button (bottom right) of the scales to
                                                      each time? What is happening?                               show digital display. Click the + sign to the right of the
Linked Objectives in all terms                                                                                    appropriate weights to add g.
Unit 1: Place Value                                   A kiwi fruit weighs 50g. If I have a net of 8 kiwi fruit,
Read scales                                           what weights will I need to show their total mass?
                                                      Where will the pointer indicate? What will the digital
                                                      display show? Is this more or less than ½ kg?               Click the + sign to the right of the chosen weights
                                                                                     1   1   3       1
                                                      How many ways can I make /4, /2, /4 and /10 of 1
                                                      kg in grams? What is the most efficient way of
                                                      making ½ kg?
                                                                                                                  Click the + sign to the right of the appropriate weights

                                                      An apple weighs 80kg. Approx how much does an
                                                      apple weigh to the nearest 100g?
Hide the pointer and scale pan. Show the digital         Set the scale to 1000 interval 50
display. Add 350g of weights. Where will the             Click the 2 left hand options of the bank of buttons
pointer be to show a cake weighing 350g? What            (bottom right) to hide the pointer and scale pan. Click
weights could I use to weigh 350g? If I eat a slice of   the black button (bottom right) of the scales to show
cake which weighs 50g, where will the pointer be         digital display. Click the + sign to the right of the
now? What weight will the digital display show?          appropriate weights to add 350g.
What weights will be in the scale pan?                   Click the pointer and scale pan reveal button (see
                                                         above). Remove the weights by clicking the - sign to the
                                                         right of the appropriate weights and add children’s
                                                         suggestion of weights for 80kg


At the airport a family’s luggage is weighed. Bag 1
weighs 19kg, bag 2 weighs 18kg. How much do              Set the scale to 100 interval 1
they weigh altogether. Where will the pointer be?        Click the + sign to the right of the appropriate weight.
What will the digital display show?                      Use the left pointing arrow (bottom left) on the scales to
                                                         move the arrow pointer to 18kg so that children have a
What is the difference between the weight of the         point of reference when you start to add extra weights to
Kahn’s luggage – 52kg and the Robinson’s luggage         the pan.
– 40kg? See limitations Page 1                           The down pointing arrow will send the pointer back to 0.
                                                         Click the black button (bottom right) of the scales to
                                                         show digital display.

								
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