One right way what culturally diverse students can teach us about math
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One Right Way? What Culturally Diverse Students Can Teach Us About Math. Barbara Acosta, M.S. Ed. Elementary and Middle Schools Technical Assistance Center (EMSTAC). Elementary and Middle Schools Technical Assistance Center. www.emstac.org. What can our students teach us about math?.

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One Right Way? What Culturally Diverse Students Can Teach Us About Math

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One Right Way? What Culturally Diverse Students Can Teach Us About Math

Barbara Acosta, M.S. Ed.

Elementary and Middle Schools

Technical Assistance Center

(EMSTAC)


Elementary and Middle Schools Technical Assistance Center

www.emstac.org


What can our students teach us about math?


Ways Math May Differ Across Cultures

  • Money and Measurement

  • Symbols

  • Language

  • Algorithms


MONEY

  • Money is money, right?

  • But wouldn’t you rather count cents, dimes and quarters than schillings?

  • How much is 250 ¢?


What the heck is a decameter, anyway?

MEASUREMENT


SYMBOLS AND NOTATIONS


THE LANGUAGE OF MATH


Er

San

Si

Wu

Liu

Qi

Ba

Jiu

Shi

Learn to Count in Chinese


10

11

12

This makes Place Value a cinch, too

31


Now Let’s Add

31 + 24 = ?

31 + 20 = 51

51 + 4 = 55


How about subtraction?

13 – 9= (10 + 3) - 9

= (10 - 9) + 3

= 4


Addition

Subtraction

Multiplication

Division

ALGORITHMS


Addition around the world

1 2 3

+31718

5 0 1

Mexico

Britain

1 9 4

+ 3 91 1

2 3 3

Ireland


“Scratch Methods”

Phillippines

Japan

- 9 7

3 4 -

- 7 9 -

+3 5

2 4 5


Subtracting in Italian

832 – 226 = ?

610


Russian “Peasant” Multiplication

230 x 17

= 3910


Practice!


Why can’t I start on the left?

South Africa

Belize


Let’s divide!


Regla de Tres (Latin America)


What will you do with all this new knowledge?


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