Activity:
Galactic Exchange Problem 

Go to: 
http://mathforum.org/escotpow/print_puzzler.ehtml?puzzle=31
(opens a new window)

Description: 
This problem allows students to investigate ratio and proportion, by discovering the exchange rate between different alien currencies (i.e. 7 circles have the same value as 3 triangles, etc.) By manipulating these exchange rates algebraically, students can come up with equations which represent the money needed to buy certain products. The use of symbols for coin types encourages a symbolic or alphabetic representation of each type of currency. 
Technology Type: 
Java Applet  
Author: 
ESCOT 
Language: 
English  
Cost: 
Does not require payment for use 

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Lesson Plan: 
Galactic Exchange Teacher Resources 
Technology PoW: 
Galactic Exchange II 
Tool: 
Galactic Exchange 
Courses: 
Math 4 
Ratio and proportion 
 Math 5 
Ratio and proportion 
 Math 6 
Ratio and proportion 
 Math 7 
Ratio and proportion 
