This week’s tech tip was about online calculators. If you’ve ever used the excuse “I left my graphing calculator at school” to explain how you didn’t have your homework done… well… I’m sorry, but I’m about to kill that excuse once and for all. CoolMath.com has an online graphing calculator which does most of what the TI graphing calculators do, but for about a hundred bucks cheaper. (Free!) Make sure you have Java installed (if you see a pink rectangle below with your Java version, you’re set to go. Otherwise, go to www.java.com/getjava ), and go to www.coolmath.com/graphit/, and give it a try. Also, some others to try are:

http://www.gcalc.net/ – Also uses Java, works great!

http://www.webgraphing.com/ – Various different levels of graphing calculators, from basic ones to advanced ones. Requires free registration, though.

http://my.hrw.com/math06_07/nsmedia/tools/Graph_Calculator/graphCalc.html – from Holt McDougal, a textbook author. Uses Flash, works nicely!

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