Visual Quantum Mechanics is a collection of activities and tutorials appropriate at the high-school level.

Creating an Energy Level to Model LEDs is a tutorial which illuminates the role of energy levels in emission spectra.

The Energy Diagram Explorer is used to illustrate the meaning of potential and kinetic energy diagrams and also to introduce a macroscopic analogue of tunneling.

Gas Lamp Emission explores the effect of transitions between electronic energy levels on observed emmision spectra

The Infrared Detector: Card Model tutorial illustrates the concepts of energy levels and energy bands, and how transitions determine emission spectra.

Matter Waves illustrates the wave-like properties of matter.

Modeling Light Emission by Fluorescent Lamps is used to explain the effect of impurities on energy bands and on the creation of metastable states.

Modeling Light Emission to Explain Phosphorescence explores transitions between energy levels of in a solid, including conduction, valence, and impurity bands.