Linkfest for Friday, April 18

• Jen Orr's first graders tell number stories and make a video of it.
• David Cox's post, Fostering the Hypothesis Wrecking Mindset, includes a list of a dozen good problems.
• Dan Finkel has been enjoying how much thinking goes on when people play his Horseshoes game, a variation on a classic number game. (Winner is the one who gets closest to the target number, using 4 given numbers.)
• Got some interesting data in a pdf file, and want to put it into a spreadsheet? Flowing Data points to a nice program to help with that.
• The 109th Carnival of Mathematics points to a game the author seems to like as well as 2048. I'll try it - Lunar Lockout.
• Toomai made a video - All Parabolas are the Same Shape.
• Mimi's Parametric Equations Animation Project
• Mr. K is introducing exponent properties with geometric series. I think I'm going to try to involve series in as many pre-calc topics as possible next semester.
• Jonathan Claydon wrote A Year with Desmos.