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 Friends of 100 Place Value 14 Create your own problem! Now solve it! Rose had 50 toy cars. How many more toy cars does Rose need to make 100? Rose had 30 toy cars. How many more toy cars does Rose need to make 100? Rose had 90 toy cars. How many more toy cars does Rose need to make 100?

3. Place Value 14 Create your own problem! Now solve it! Matt found 100 shells at the beach. He gave 30 to Sharon. How many shells does Matt have left? Matt found 100 shells at the beach. He gave 50 to Sharon. How many shells does Matt have left? Matt found 100 shells at the beach. He gave 70 to Sharon. How many shells does Matt have left? Problem Solving Friends of 100

4. Place Value 14 Problem Solving Make friends of 100, through addition and commutativity, and through subtraction.

5. Place Value 14 This room had 100 chairs. Sam came in and took some chairs, and now the room has 70 chairs. How many chairs did Sam take? Create your own problem! Now solve it! This room had 100 chairs. Sam came in and took some chairs, and now the room has 60 chairs. How many chairs did Sam take? This room had 100 chairs. Sam came in and took some chairs, and now the room has 20 chairs. How many chairs did Sam take? Problem Solving Friends of 100

6. Place Value 14 In a hockey game between the Giants and the Bulls, there were 100 goals scored. How many goals might each team have scored? In a basketball game between the Blues and the Reds, there were 100 goals scored. How many goals might each team have scored? At the Olympics 100 medals in total were earned by Romania and Greece. How many medals might each country have received? Create your own problem! Now solve it! Problem Solving Friends of 100

7. Place Value 14 There are 100 seats on the train. 30 children got on the train. How many empty seats are left on the train? There are 100 seats on the train. 80 children got on the train. How many empty seats are left on the train? There are 100 seats on the train. 10 children got on the train. How many empty seats are left on the train? Create your own problem! Now solve it! Problem Solving Friends of 100

8. Place Value 14 This room has 100 chairs. 30 children sit on the chairs How many chairs have no one sitting on them? This room has 100 chairs. 20 children sit on the chairs How many chairs have no one sitting on them? This room has 100 chairs. 60 children sit on the chairs How many chairs have no one sitting on them? Create your own problem! Now solve it! Problem Solving Friends of 100

9. Place Value 14 This room has 70 chairs. 100 children want to sit down. How many more chairs will they need? This room has 80 chairs. 100 children want to sit down. How many more chairs will they need? This room has 10 chairs. 100 children want to sit down. How many more chairs will they need? Create your own problem! Now solve it! Problem Solving Friends of 100

10. Place Value 14 There were 100 children on the train. 30 children got off. How many children on the train? There were 100 children on the train. 50 children got off. How many children on the train? There were 100 children on the train. 60 children got off. How many children on the train? Create your own problem! Now solve it! Problem Solving Friends of 100

11. Place Value 14 2 apple trees had 100 apples altogether. How many apples could be on each tree? 2 fish ponds had 100 fish altogether. How many fish could be in each pond? 2 buses carried 100 children altogether. How many children could be on each bus? Create your own problem! Now solve it! Problem Solving Friends of 100