Archive for September, 2009

Cheating Graphically

Posted: September 20, 2009 in math

Recently spotted on the Duarte Blog: Cheating by Charting. An excerpt from Spear’s Practical Charting Techniques. This stuff is genius. Methinks this could be used in math class. “Hey kids, we’re going to play Corporate Spin today. You’ll hide a disappointing stat in a graph so the public doesn’t realize how much we’re polluting/raising prices/whatever.” [...]

Google Maps and Trigonometry

Posted: September 13, 2009 in math

What time of day was this photo of the Washington Monument taken? While writing this warm-up question, I came across the Sun or Moon Altitude/Azimuth Table page. Supply a location and a date and this page will tell you the angle of sun in the sky for any time of day. (Interesting side note: This [...]

My students will be calculating the circumference of the Earth, ala Eratosthenes (who did his work over 2200 years ago). Setup: put a few key facts on note cards and hand them out to a few students. Give everyone a copy of the task sheet. Challenge the class to bring you the circumference of the [...]

Imaginary Blackjack Game

Posted: September 1, 2009 in math

(Props to my colleague Annie Sun for the idea for this game) The goal is to get as close to 21 + 21i without going over. Georgia Performance Standard MM2N1(b,c)