Links are consistently displayed, though not always reversible. On occasion some of these links will open in another browser window, not allowing the user to go back to the point of origin. There are a number of links to external WWW sites, many of which are interesting and relevant to the material. There are no instructor materials provided with the module. There are multiple ways for students to interact with the concepts demonstrated within the module.
Users have the opportunity to answer questions and to plot points on various graphs.
These graphs also serve to illustrate the concepts presented. Students are also able to take different paths within the module, allowing them to explore some concepts more than others. It does not appear, though, that the module can be modified by either the students or the instructors, with the exception of the various practice exercises. This might be possible with the addition of either instructor materials or student instructions, or both. The module does not explicitly support the need for collaborative work or any sort of collaborative decision-making.