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 Place Value of Teen Numbers Place Value 7 Create your own problem! Now solve it! Fred had this packet of lollies. Gina had these individual lollies. Did they have the same number of lollies? Fred had this packet of marbles. Gina had these individual marbles. Did they have the same number of marbles? Fred had this packet of pencils. Gina had these individual pencils. Did they have the same number of pencils?

3. Problem Solving Place Value of Teen Numbers Place Value 7 Create your own problem! Now solve it! Millie and Rose made a teen number with their fingers. Millie was showing 10 fingers and Rose was showing 7 fingers. How many fingers altogether? Millie and Rose made a teen number with their fingers. Millie was showing 10 fingers and Rose was showing 4 fingers. How many fingers altogether? Millie and Rose made a teen number with their fingers. Millie was showing 10 fingers and Rose was showing 6 fingers. How many fingers altogether?

4. Problem Solving Place Value of Teen Numbers Place Value 7 Create your own problem! Now solve it! Millie and Rose were showing 18 fingers. Millie was showing 10 fingers. How many fingers was Rose showing? Millie and Rose were showing 16 fingers. Millie was showing 10 fingers. How many fingers was Rose showing? Millie and Rose were showing 17 fingers. Millie was showing 10 fingers. How many fingers was Rose showing?

5. Problem Solving Place Value of Teen Numbers Place Value 7 Create your own problem! Now solve it! Jon collected five marbles. How many more marbles does he need to have fifteen marbles? How do you know? Jon collected six marbles. How many more marbles does he need to have sixteen marbles? How do you know? Jon collected four marbles. How many more marbles does he need to have fourteen marbles? How do you know?

6. Problem Solving Place Value of Teen Numbers Place Value 7 Create your own problem! Now solve it! Gina recorded a teen number with 2 digits. One of the digits was 5. What was the other digit? Gina recorded a teen number with 2 digits. One of the digits was 4. What was the other digit? Gina recorded a teen number with 2 digits. One of the digits was 7. What was the other digit?

7. Problem Solving Place Value of Teen Numbers Place Value 7 Create your own problem! Now solve it! Matt found these shells at the beach. How many shells does Matt have? How do you know? Matt found these shells at the beach. How many shells does Matt have? How do you know? Matt found these shells at the beach. How many shells does Matt have? How do you know?

8. Problem Solving Place Value of Teen Numbers Place Value 7 Create your own problem! Now solve it! Fred had this packet of pencils. Gina had 4 individual pencils. How many pencils altogether? Fred had this packet of marbles. Gina had these individual marbles. How many marbles altogether? Fred had this packet of lollies. Gina had these individual lollies. How many lollies altogether?

9. Problem Solving Place Value of Teen Numbers Place Value 7

10. Problem Solving Place Value of Teen Numbers Place Value 7 Create your own problem! Now solve it! Jan has 10 toy cars. Ella has 4 more. How many toy cars does Ella have? How do you know? Jan has 10 toy cars. Ella has 6 more. How many toy cars does Ella have? How do you know? Jan has 10 toy cars. Ella has 5 more. How many toy cars does Ella have? How do you know?

11. Problem Solving Place Value of Teen Numbers Place Value 7 In a basket ball game between the Blues and the Reds, There were 14 goals scored. The Blues scored 10 goals. How many did the reds score? How do you know? In a basket ball game between the Blues and the Reds, There were 19 goals scored. The Blues scored 6 goals. How many did the reds score? How do you know? Create your own problem! Now solve it!

12. Problem Solving Place Value of Teen Numbers Place Value 7 There are 14 seats on the bus. 10 children got on the bus. How many empty seats are there on the bus? There are 18 seats on the bus. 10 children got on the bus. How many empty seats are there on the bus? There are 12 seats on the bus. 4 children got on the bus. How many empty seats are there on the bus? Create your own problem! Now solve it!

13. Problem Solving Place Value of Teen Numbers Place Value 7 This room has 15 chairs. 5 children sit on the chairs. How many chairs have no one sitting on them? Create your own problem! Now solve it! This room has 16 chairs. 6 children sit on the chairs. How many chairs have no one sitting on them? This room has 14 chairs. 4 children sit on the chairs. How many chairs have no one sitting on them?

14. Problem Solving Place Value of Teen Numbers Place Value 7 Create your own problem! Now solve it! This room has 10 chairs. 14 children want to sit down. How many more chairs will they need? This room has 10 chairs. 16 children want to sit down. How many more chairs will they need? This room has 10 chairs. 15 children want to sit down. How many more chairs will they need?

15. Problem Solving Place Value of Teen Numbers Place Value 7 There were 15 children on the bus. 5 children got off. How many children on the bus? Create your own problem! Now solve it! There were 16 children on the bus. 6 children got off. How many children on the bus? There were 14 children on the bus. 4 children got off. How many children on the bus?

16. Problem Solving Place Value of Teen Numbers Place Value 7 2 apple trees had 14 apples altogether. One tree had 4 apples. How many apples were on the other tree? 2 apple trees had 17 apples altogether. One tree had 10 apples. How many apples were on the other tree? 2 apple trees had 13 apples altogether. One tree had 6 apples. How many apples were on the other tree? Create your own problem! Now solve it!