This is Sheet Music Montage, Coney Island 1950 by Harold Feinstein. I found it via Sad Burro. I’m not sure why, but the patterns and reptitition in this image speak to my mathy sense of beauty
I’m really excited about the potential of an new app called MathChat. It is an app that allows students to key in problems. Start to solve them, and when they get stuck have their peers comment and help. It is kind of a mobile version of the OpenStudy website. A couple of perks: as students work through expressions/equations, MathChat checks their work line by line. It only tells them if it is equivalent or not. The student still has to find the mistake and fix it. Also, MathChat uses the touch capabilities of the mobile environment, so that peers can give you help by writing on your problem. This is a real nice touch. It is early and I haven’t really had a chance to test drive this app with students, but the app holds a lot of promise.
found via Free Tech for Teachers
I was really blown away with Desmos. They just keep getting better. I found out this week they have apps now for i0S and Android and let you upload pictures. I was trying to figure out the parabola of my smile here. I uploaded my headshot and used a slider to play with the leading coefficient. Looks like I’m y=0.4x^2
Think you will never use math in the real world? Check out this fix for a table with a bad case of the wobbles via LifeHacker.
Jay came through with a great link this week. Check out this list of great math/sci gifs. Thanks, Jay!
I got to demo a great new product last week. It is called Mathspace. It is both a web and mobile app, and the real innovation is their exercises allow you to write and check intermediate steps. And their handwriting interpreter is the best I’ve seen. It is a little hard to explain exactly what I mean. Check out the gif above.
There are other perks like adaptive learning, videos, badging, and a gradebook, but it is the above feature that really sets the app apart. The company is young and adding content. Definitely something to watch out for.
I caught a great visualization for Pascal’s triangle on Visualizing Math’s Tumblr.
Whenever I’m teaching the quadratic formula I love telling students that there is a formula “like the quadratic” for cubic and quartic equations, but that after that there isn’t any. They seem amazed by it. I guess because it is still amazing to me. I found a real nice graphic by the mathematical poet with each of the formulas. I’m going to pull this out next time I have that discussion so they can see what the formulas look like.