Hi Shane: I certainly agree that being sensitive to the student's attention and comprehension is an aspect of student centered instruction. We want to be able to "reach and teach" to all our students. We may need to vary the way we deliver the course, alter the media we've chosen, consider using different or additional resources, modify our testing and assessment, or tweak our lesson plans to keep aligned with where the students are tracking. These are just a few examples where student performance can be improved through focusing on their learning rather than focusing on our teaching. Ultimately these two must come together, and be balanced. Regards, Barry