1. Goals are clearly stated and repeated
2. Motivation and direct engagement increases the potential for student learning
3. The hands-on and reflective approach promotes understanding of the concepts
In summary, the e-textbook is organized in appropriate chapters, each of which has clear leanring goals and and rich content. It contains some practical exercise to promote students to apply the learned knowledge into practices. It is very useful and effective for reinforce concepts. Instructors can readily use the textbook in courses as it provides instructors' guide which is very helpful for teachers to plan their classes.