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 Measurement and Geometry Marjorie drew a picture of a shape that tessellates. What shape could Marjorie have drawn? Create your own problem! Now solve it! Measurement and Geometry 38 Marjorie drew a picture of a shape that does not tessellate. What shape could Marjorie have drawn?

3. Problem Solving Measurement and Geometry Mina wrote a letter with 1 line of symmetry. What letter might she have written? Create your own problem! Now solve it! Measurement and Geometry 38 Mina wrote a letter with 0 lines of symmetry. What letter might she have written? Mina wrote a letter with 2 lines of symmetry. What letter might she have written?

4. Problem Solving Measurement and Geometry How many lines of symmetry does this letter have? H Create your own problem! Now solve it! Measurement and Geometry 38 How many lines of symmetry does this letter have? A How many lines of symmetry does this letter have? L

5. Problem Solving Measurement and Geometry Which flag design has exactly 2 lines of symmetry? Create your own problem! Now solve it! Measurement and Geometry 38 Which flag design has exactly 1 line of symmetry? Which flag design has exactly 0 lines of symmetry?

6. Mary uses tiles of one shape to tile her bathroom floor. The tile tessellates. Which shaped tile could she use? Problem Solving Measurement and Geometry Mary uses tiles of one shape to tile her bathroom floor. The tile tessellates. Which shaped tile could she use? Create your own problem! Now solve it! Measurement and Geometry 38

7. Problem Solving Measurement and Geometry Which design has zero lines of symmetry? Create your own problem! Now solve it! Measurement and Geometry 38 Which design has two lines of symmetry? Which design has one line of symmetry?

8. Problem Solving Measurement and Geometry Kanye makes each of these designs by using the triangle four times. Which of Kanye’s designs has only two lines of symmetry? Create your own problem! Now solve it! Measurement and Geometry 38 Kanye makes each of these designs by using the triangle four times. Which of Kanye’s designs has only 1 line of symmetry?

9. Problem Solving Measurement and Geometry Donald made this design. He then reflected the design over the line of symmetry to the right. What will the reflected design look like? Create your own problem! Now solve it! Measurement and Geometry 38 Donald made this design. He then translated the design to the right. What will the translated design look like?