Group items tagged

Dynamic textbook, lesson plans, widgets, interactive demonstrations, etc. from the makers of Mathematica, Wolfram|Alpha, and the Wolfram Demonstrations Project

Victor Borge demonstrates what the English language might be like if it followed the economy's pattern of inflation. It's highly amusing!

An animation regarding prime and composite numbers. It demonstrates the Sieve of Erastothenes which is a method/algorithm for finding prime numbers.

A collection of math related topics from basic arithmetic to geometry and combinatorics. Presents the concepts in an easy to understand way, also provides applets demonstrating concepts.

This applet from MIT allows you to select from 8 examples of differential equations. It allows you to select the step size. As you toggle through, the step size you selected traces out the "solution" in the vector field. You can then change the step size. It demonstrates the value of a small step size and also provides the actual solution.

This activity had a huge impact on me in high school and it is something I would love to do with my students!  This article is a good demonstration of the importance of this contest.

A great demonstration of how to use Diigo.

Good for demonstrating that correlation is not the same as causation.

The Enigma Machine used by the Nazis in WWII enciphered messages using a series of wires and rotors, and it took mathematicians Marian Rejewski and Alan Turing to decipher this complex coding machine.

Demonstrates how to use the formulae for differences of squares, and warns against trying to factor a sum of squares. Purple math explanation to factor difference of squares.

Sine and cosine applet

The applet allow you to control a point on the unit circle. As you move the point, the sine function is traced out.

Tutorials and lesson ideas

Purplemath contains practical algebra lessons demonstrating useful techniques and pointing out common errors. Lessons are written with the struggling student in mind, and stress the practicalites over the technicalities. Links and other resources also available.

Great link. Added to my library.