First Day Activity: Puzzlers

On the first day of class in AP Calculus and Pre-Calculus Honors I’ll give out the following list of puzzlers that they’ll have a limited amount of time to work on. The students will be working in groups on the new $2 interactive whiteboards. Google Doc link. PDF link. Btw, I still haven’t figured out […]

Chipotle Math

From the consumerist: On the first, dated July 13, the nine items added up to $32.93. There was $2.31 in tax. The total should have been $35.24, but next to the “total” line on the receipt, it said $35.25. The next receipt, with the same sale date, showed a subtotal of $8.64. The tax was $0.60, […]

Intelligently Cracking Passwords

From Ars: One promising technique is to use programs such as the open-source Passpal to reduce cracking time by identifying patterns exhibited in a statistically significant percentage of intercepted passwords. For example, as noted above, many website users have a propensity to append years to proper names, words, or other strings of text that contain […]

Programming Software Tools

I thought it might be useful to share a list of programming tools that I use in my Intro to Programming class. This is also an update to my earlier programming ideas post from last year. My general rule for software in this class is that it should be free and multi-platform. If they kids […]