VIEWS: 7 PAGES: 3 POSTED ON: 5/3/2011
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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