Leaking Gasoline Puzzler
The Last Gasp of the Fiat “A car travels at a steady speed of 45 mph. Its fuel consumption is 30 miles to the gallon.ย It has a 15-gallon gas tank,ย which was full when the car started off. But at the … Continue reading
Author Archives: Dan
Khan Academy and SBG
@CmonMattTHINK put forth a comment on twitter a couple of mornings ago: Salman Khan TED-talks about classroom inversion: http://www.ted.com/talks/salman_khan_let_s_use_video_to_reinvent_education.html Very exciting, yes. But I must be the cranky old man and say.. SO much of this (and SBG) is about … Continue reading
Toilet Paper Tubes and the Empire State Building #wcydwt
So I’m watching the idiot tube the other day and I saw a commercial by Scott Paper Company that claimed that if everyone in America used their tubeless toilet paper product, then we would save two Empire State buildings of … Continue reading
The Cosmonaut: An Economic Experiment
So the guys who made the glif with much success, are now introducing another product on kickstarter. The Cosmonaut. Its a wide-grip capacitive stylus for tablets. The interesting thing is their pricing model. They are selling 3,000 of them, and … Continue reading
Two Great Graphing Tools
Here’s a quick post describing two pretty great graphing extensions for google chrome: And: To install the extensions, you need to have a relatively new version of chrome. Next go to the webstore and search for the right extension. Enjoy!
Why Teachers Like Me Support Unions.
Why do I support teacher unions? Because the quality of education is better. Yes it is. (note: I worked in a private boarding school for two years before moving to public schools). We want our students taught by teachers who … Continue reading
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No Homework Grade! No Way!
In concert with the Standards Based Grading, I’ve also changed my homework policy. In the past I would check homework completion levels every day from every student. They would have a grade out of 4; 4 fully done, 2 half … Continue reading
Firecrackers #wcydwt
Quick one: How many fireworks per second? Edit: There are 320,000 fireworks!!
Three Slips of Paper – Car Talk Puzzler
Excellent probability (ish) puzzler from Car Talk: Three Slips of Paper RAY: This is from Norm Leyden from Franktown, Colorado. The date on it is 1974–I’m a little behind. Three different numbers are chosen at random, and one is written … Continue reading
“Skinny” Diet Pepsi Can WCYDWT
Diet Pepsi will soon be available in a “taller, sassier new Skinny Can” that the company says is a “celebration of beautiful, confident women.” (Article linked by @21stcenturychem and found here.) I’ll table the discussion on whether or not this … Continue reading