One Right Way? What Culturally Diverse Students Can Teach Us About Math - PowerPoint PPT Presentation

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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

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

Elementary and Middle Schools Technical Assistance Center

www.emstac.org


One right way what culturally diverse students can teach us about math

What can our students teach us about math?


Ways math may differ across cultures

Ways Math May Differ Across Cultures

  • Money and Measurement

  • Symbols

  • Language

  • Algorithms


Money

MONEY

  • Money is money, right?

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

  • How much is 250 ¢?


Measurement

What the heck is a decameter, anyway?

MEASUREMENT


Symbols and notations

SYMBOLS AND NOTATIONS


The language of math

THE LANGUAGE OF MATH


Learn to count in chinese

Er

San

Si

Wu

Liu

Qi

Ba

Jiu

Shi

Learn to Count in Chinese


This makes place value a cinch too

10

11

12

This makes Place Value a cinch, too

31


Now let s add

Now Let’s Add

31 + 24 = ?

31 + 20 = 51

51 + 4 = 55


How about subtraction

How about subtraction?

13 – 9= (10 + 3) - 9

= (10 - 9) + 3

= 4


Algorithms

Addition

Subtraction

Multiplication

Division

ALGORITHMS


Addition around the world

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

“Scratch Methods”

Phillippines

Japan

- 9 7

3 4 -

- 7 9 -

+3 5

2 4 5


Subtracting in italian

Subtracting in Italian

832 – 226 = ?

610


Russian peasant multiplication

Russian “Peasant” Multiplication

230 x 17

= 3910


Practice

Practice!


Why can t i start on the left

Why can’t I start on the left?

South Africa

Belize


Let s divide

Let’s divide!


Regla de tres latin america

Regla de Tres (Latin America)


What will you do with all this new knowledge

What will you do with all this new knowledge?


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