This web site provides a series of tutorials developed to support students in transforming their ontological conceptions about quantum phenomena: their sense of whether something is a particle, a wave, or some other kind of thing, and to make students more aware of their own thinking about these issues. These tutorials are not designed to introduce new content, but can be used alongside other course materials. Each 1-hour tutorial is done with groups of 3-5 students discussing the questions. They are not intended for the answers to be handed in, and in many cases there is not a single "correct" answer.

These tutorials were first designed to be used in a modern physics course for engineering students. Testing has shown they are useful for physics majors. Topics range from plane waves and particle-in-a-box models to the Zeeman Effect and LEDs.

Instructors are welcome to adapt these tutorials. Instructor guides are available for each tutorial that provide information about the intent of the tutorials and some of the results from their use.