The site is very comprehensive, thereby allowing an instructor to use it for several weeks or more of a typical first semester course. An instructor could use this site exclusively for Mechanics, so that searching for other sites is not needed. It is designed so the student can proceed at a slow, steady pace. It may be used as an in-class activity or for homework.
This material is interactive and provides immediate feedback to students. The activities that the students have to perform range from fairly simple and straight forward to very challenging, thus making them useful for a wide range of student background and skills. It is designed so a student can proceed at a slow, steady pace if needed. It may be used as an in-class activity or for homework.
The connection between the tutorial materials and the student activities,
using the same interface and language, creates a coherent and extensive resource. However, because of the modular nature of the exercises, single exercises or illustrations can be used stand-alone very effectively. This makes these resources very flexible in their instructional uses.
The fact that this program allows instructors to track the student usage and grades for these exercises is important. Students can be motivated by having their use of this material be a part of their grades.