1. Differential homework assignments: for example 1 easy theory, 1 easy methods, 1 hard theory, 1 hard methods and ask students to solve 3.
2. Survey the class 4-7 weeks into the semester and share the results with the class (this way the ones who want change will understand why you didn't change).
3. Ask what the students want to learn; perhaps they are in the wrong class
4. Use a variety of teaching strategies to accommodate different learning styles (verbal description, pictorial and graphical description, equations to make exact, case studies to illustrate, discussion to relate to students' specific interests)