Java applets For the Java pages, you might need to update your Java installation. To see what version you are currently running, visit javatester.org. Additionally, if you use Firefox, you might need to reset the "Zoom" level ("View: Zoom: Reset") in order for these applets to display correctly. Reflecting Walls for Bouncing Balls (beta)—animated orthogonal trajectories for families of projectile-motion paths. Quincunx / Galton Box / Bean Machine (beta)—watch marbles fall through a grid of "pins" and pile up at the bottom. Maze Profiler (beta)—how does the algorithm used to generate a maze affect its appearance? How to Get a Date—a simulation of two (or three) men trying to decide when they should call "Ann" to get a date. Exploring orthogonal trajectories—now with an improved interface. I think this now runs correctly on all machines with up-to-date Java. Regression Toy—explore what the "best fit" line looks like, with various definitions of what is "best." The Three Sticks puzzle—my first applet (and it shows).

JavaScript pages Derivative practice—this page generates random functions, and allows you to try to find the derivative. Sorting Algorithms demonstration—with "source code" tracing. Making Mazes—observe the step-by-step process of making mazes (using several different algorithms). The A-Maze-Ing Puzzle—Can you find the starting point of a randomly generated maze? KenKen helper—see all the possible ways to fill in the cages in the puzzle KenKen. The "Secret Santa Server"—a Web page to help choose names for a gift exchange (ensuring that no one draws his/her own name, as well as any other restrictions you would like to enforce). Rook Polynomials—computes the "rook polynomial" for a user-specified chessboard. David's science project—READY TO GO!