Here is a fun fact to demonstrate to your students:
Think of two positive integers.
Add them to get a third number.
Add the second number and the third number to get a fourth number.
Continue in this way until you have 10 numbers.
The sum of the 10 numbers is 11 times the seventh number.
found via Futility Closet
The web’s coolest graphing utility becomes cooler by adding regression. Take the tour.
I caught this beautiful new stamp on the Guardian. I wish I could have a poster of it for my office.
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
One of our own, Lee Bradley, has just written a book called A Programmer’s Guide to the Meaning of Life. Knowing a little about Lee’s eclecticism, this is sure to be a good read. I’m heading to pick up a copy now at lulu.com. Go Tunxis community!
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.