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 47 Jill measured the mass of an object on a set of scales. What fraction of a kilogram is the mass of the object? June’s cake weighs 750g. What fraction of a kilogram is the mass of the cake?

3. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 47 What object could have a mass of about 750 grams? What object could have a mass of about 1250 grams? What object could have a mass of about 40 grams?

4. Problem Solving Mass Create your own problem! Now solve it! Multiplication and Division 47 Sue measured the mass of her shoe. Which could be closest to the mass of her shoe? 100 grams or 750 grams? Sue measured the mass of her lollipop. Which could be closest to the mass of her lollipop? 100 grams or 20 grams?