1. Implementation 1.Review the mathematical concept. 2.Review the problem solving steps. 3.READ: Children read the part that is asking them to find something out. 4.UNDERSTAND: Children explain what they need to find out. 5.Children identify what information they will need to find it out. 6.Remove the coloured rectangle. 7.Children find the information they need to find it out. 8.CHOOSE A STRATEGY: Children identify strategies that they could use to find it out. 9.USE A STRATEGY: Children use a strategy to find it out. 10.Children record their thinking as they find it out. 11.CHECK: Children reread the part that asked them to find something out. 12.Children check that they have found it out. 13.Children check they have recorded their solution correctly. 14.Children follow the problem solving steps to solve the 2 nd level of the problem, with minimal teacher guidance. 15.Children who solve the 2 nd level, follow the problem solving steps to solve the 3 rd level of the problem independently. 16.Children use the problems as a guide to create their own problem, either alone or in pairs/small groups. 17.Children solve their own problem. Throughout the lesson, children share solution strategies. At the end of the lesson, children explain how they created their own problems.

2. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 67 Greg is making trips from the tap to the pool carrying buckets of water. Each bucket load contained 9 litres of water. He made 5 trips. What was the total mass of the water Greg carried? Greg is making trips from the tap to the pool carrying buckets of water. Each bucket load contained 17 litres of water. He made 5 trips. What was the total mass of the water Greg carried?

3. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 67 Greg making trips from the tap to the pool was carrying buckets of water. Each bucket load contained 9 litres of water. The mass of the bucket was 250 grams. He made 5 trips. What was the total gross mass of the bucket and the water Greg carried? Greg making trips from the tap to the pool was carrying buckets of water. Each bucket load contained 17 litres of water. The mass of the bucket was 250 grams. He made 5 trips. What was the total gross mass of the bucket and the water Greg carried?

4. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 67 A container had a volume of 2000 cubic centimetres. How many litres of water could it hold? A container had a volume of 2000 cubic centimetres. How many litres of water could it hold? What would the net mass of the water be? A container had a volume of 2000 cubic centimetres. How many litres of water could it hold? The container had a mass of 125 grams. What would the gross mass of the container and the water be?

5. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 67 Children draw a container with a base of 5 cm x 10 cm and height 40 cm. What is the net mass of the water if the container is filled to capacity? Children draw a container and calculate the depth of 1 litre of water in a container with a base of 5 cm x 10 cm and height 40 cm weighing 525 grams. What is the gross mass of the water?

6. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 67 A school bus has a 2.4 tonne carrying capacity. How many children could be on the bus? A bus has a 2.4 tonne carrying capacity. How many adults could be on the bus? A bus has a 2.4 tonne carrying capacity. Some of the people on the bus are adults and some are children. How many people could be on the bus?

7. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 67 Ronald has a landscaping business. He bought 780 kilograms of white pebbles, 475 kilograms of gold pebbles and 625 kilograms of black pebbles. The total mass of Ronald’s items is closest to: 1 tonne, 1.25 tonne, 1.5 tonne or 2 tonne? One apple weighs approximately 160 grams. Julia bought 8 apples. The total mass of the apples is closest to: 1 kilogram 1.1 kilogram 1.2 kilogram or 1.3 kilogram?

8. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 67 Gill needs 1 tonne of sand. She has 0.76 tonne. How much more sand does she need? Susan bought a pile of sand. After she used 1/2 of the sand, she had a total of 0.33 tonne of sand left. How many kilograms of sand were in the pile? Gary needs 1.25 tonne of sand. He has 760 kilograms. How much more sand does he need?

9. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 67 Frank wants to make a cake. He buys 250 grams of butter, 1 kilogram of sugar, 1.5 kilograms of flour. What is the total mass of these items? Alice has a delivery business. Each of her trucks can carry 2 tonnes. A customer buys 780 kilograms of white pebbles, 675 kilograms of gold pebbles and 0.6 tonne of black pebbles. Can the pebbles be delivered on one truck?