I created most of these demonstrations (all that were created with GeoGebra) to use both inside and out of the classroom.  These demonstrations consist of graphical demonstration of an important concept, or a simulation of classical problems which presents data "real-time." If you have any questions or comments, please email me.  Note, in order to run the GeoGebra applets you may have to click on "View as Java Applet" on the bottom of the demonstration page.