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Interactive
University of Colorado

University of Colorado: Ph Et Interactive Simulations: Quantum Bound States

For Students 9th - 10th
Explore the properties of quantum particles bound in potential wells, and see how the wave functions and probability densities that describe them evolve (or don't evolve) over time.
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Activity
American Association of Physics Teachers

Com Padre Digital Library: Open Source Physics: Uniform Spherical Distribution

For Teachers 9th - 10th Standards
The java simulation demonstrates methods for picking a random point on a sphere. Both the incorrect method of a uniform random distribution as well as the correct weighted distribution are shown.
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Unit Plan
Khan Academy

Khan Academy: The Quantum Mechanical Model of the Atom

For Students 9th - 10th
An explanation using quantum mechanics to describe the atom.
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Activity
American Association of Physics Teachers

Com Padre Digital Library: Open Source Physics: Multiplicative Process Program

For Teachers 9th - 10th Standards
The mathematics resource uses a downloadable java applet to simulate the outcome of a product of random numbers. Examples of multiplicative processes include the distributions of incomes and rainfall.