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# SDE Day 3 Sessions

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Updated slides for the four sessions on Day 3 of SDE's National Conference on Singapore Math Strategies

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### SDE Day 3 Sessions

1. 1. morning session| SE03 Developing the Ability to See Patterns through Mathematics yeap ban har | marshall cavendish institute yeapbanhar@gmail.com | www.banhar.blogspot.com
2. 2. what? to meet demands of global economy Problem-Solving Approach how? to meet the needs of every learner CPA Approach
3. 3. application lesson | In Common Core State Standards, Grade 4 students learn about angles and by Grade 8, they learn about sum of exterior and interior angles of polygons.
4. 4. drill-and-practice lesson | Multi-digit division is done in Grades 3 through 5 in Common Core State Standards.
5. 5. 1 2 3 4 5 6 7 9 8
6. 6. morning session| SE09 Visualization – Getting Students to See the Math yeap ban har | marshall cavendish institute yeapbanhar@gmail.com | www.banhar.blogspot.com
7. 7. We will use a tangram set for this workshop. You can cut them out from your handouts or make one using the square paper provided. You can also download a tangram app from Apple Store.
8. 8. 3-piece solutions
9. 9. 3-piece solutions
10. 10. 3-piece solutions can be extended to give 5-piece solutions by adding two largest triangles.
11. 11. A non-congruent 5-piece solution
12. 12. y + z = 162 Sum of angles = 360 + 180 = 540 3x = 540 – 2 x 162 3x = 540 – 324 3x = 216 x = 72 Greg Tang’s solution: z = 2y (why?) y + z = 162 3y = 162 = 150 + 12 y = 54 x = 180 – 2 x 54 = 180 – 108 = 72
13. 13. afternoon session| SF03 Developing Number Sense – A Differentiated Approach yeap ban har | marshall cavendish institute yeapbanhar@gmail.com | www.banhar.blogspot.com
14. 14. Singapore Malaysia Thailand Indonesia International 48 2 2 0 3 78 12 8 2 17 92 36 26 15 46 99 65 55 43 75 611 440 427 386 500 advanced high intermediate low average gradeeightmathematics
15. 15. afternoon session| SF08 Engaging Students in Deep Mathematical Thinking with Anchor Tasks yeap ban har | marshall cavendish institute yeapbanhar@gmail.com | www.banhar.blogspot.com
16. 16. Area = 2.5 Number of dots around the polygon = 5 Area = 2 Number of dots around the polygon = 4 Area = 1.5 Number of dots around the polygon = 3
17. 17. Area = 6.5 Number of dots around the polygon = 11 Area = 11.5 Number of dots around the polygon = 23 Area = 12 Number of dots around the polygon = 24
18. 18. Lim Siong Guan Head, Civil Service Singapore