More than just a book, this text is part of a system to teach engineering mechanics, a system comprised of three components: 1) this core principles book, 2) algorithmic problem material available online, and 3) a course management system to track and monitor student progress. By using this system, instructors and their students benefit from increased flexibility in the ability to assign and grade problems, and the ability to make sure each student works a “unique” version of a problem, all coming at a lower price and in a smaller package.