The test organisms are dragons. Dragons were chosen because they are fantasy animals and thus problems of ethics don't arise when dealing with them. The traditional back-crosses of genetics, for example, may be performed without worrying about moral issues. Two dragons from the organism level can be dragged into the pedigree level and a family tree can be made. The family can be dragged into the population level so that the trait being followed in one family can now be followed in an entire population as the individuals interact.
Instruction is conducted by giving the students genetics puzzles that they solve using the computer.
Other species are introduced, including Labrador retrievers, horses, and humans. It is a new way to use the computer. That means that the student can change parameters at one level and affect all the other levels. Our most recent experiences have been in inner city high schools with students who are apathetic, if not turned off altogether. Science instruction most often includes filling out worksheets, taking notes in lectures and reading the textbook in class.