NCLab is a public cloud computing platform for K-12 schools

https://nclab.com/

NCLab is a public cloud computing platform for K-12 schools and homeschoolers, that provides engaging self-paced interactive courses in various STEM subjects.

The electrostatics elasticity modules look interesting!

    https://nclab.com/electrostatics/

    https://nclab.com/elasticity/

Warning. Some of the content is not free.

 

 

Web-based tools illustrating basic concepts and algorithms of scientific computing

http://www.cse.illinois.edu/iem/

 

The interactive educational modules on this site assist in learning basic concepts and algorithms of scientific computing., Each module is a Java applet that is accessible through a web browser., For each applet,  you can select problem data and algorithm choices interactively and then receive immediate feedback on the results,  both numerically and graphically.

What’s My Model?

http://education.ti.com/educationportal/activityexchange/Activity.do?cid=US&aId=8518

“Students will investigate several different regression models and determine which of the models makes the most sense, based upon a real-world situation (cooling a cup of hot chocolate).”

This is geared for TI calculators but the idea could be used for applications on computers also.

Fractal Science Kit

http://www.fractalsciencekit.com/

The Fractal Science Kit is a program to explore a mathematical object called a fractal. The term fractal was coined by Benoit Mandelbrot in 1975 in his book Fractals: Form, Chance, and Dimension. In 1979, while studying the Julia set, Mandelbrot discovered what is now called the Mandelbrot set and inspired a generation of mathematicians and computer programmers in the study of fractals and fractal geometry.

It does cost $49.95 but it looks good!