sde day 3 sessions
DESCRIPTION
Updated slides for the four sessions on Day 3 of SDE's National Conference on Singapore Math StrategiesTRANSCRIPT
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morning session|
SE03 Developing the Ability to See Patterns through Mathematics
yeap ban har | marshall cavendish institute
[email protected] | www.banhar.blogspot.com
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what?
to meet demands of global economy
Problem-Solving Approach
how?
to meet the needs of every learner
CPA Approach
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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.
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drill-and-practice
lesson |
Multi-digit division is done in Grades 3 through 5 in
Common Core State Standards.
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1
2
3
4
5
6
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9
8
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morning session|
SE09 Visualization – Getting Students to See the Math
yeap ban har | marshall cavendish institute
[email protected] | www.banhar.blogspot.com
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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.
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3-piece solutions
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3-piece solutions
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3-piece solutions can be extended to give 5-piece solutions by adding two largest triangles.
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A non-congruent 5-piece solution
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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
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afternoon session|
SF03 Developing Number Sense – A Differentiated Approach
yeap ban har | marshall cavendish institute
[email protected] | www.banhar.blogspot.com
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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
adva
nced
high
inte
rmedia
te
low
ave
rage
grad
e ei
ght
mat
hem
atic
s
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afternoon session|
SF08 Engaging Students in Deep Mathematical Thinking with Anchor Tasks
yeap ban har | marshall cavendish institute
[email protected] | www.banhar.blogspot.com
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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
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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
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Lim Siong Guan Head, Civil Service
Singapore