Yes Marsha, it is totally difficult at times to reach all students in the short periods of our terms. When I first introduce myself to the students at the beginning of each term, I express to them the resources we have for them to seek out and utilize on their own time schedules beyond our short class periods with them. Further, I use different types of Teaching Styles with the indent to reach All Types of Learners. For example, visual, verbal, written and overhead. Class Projects for credit points help as well. Hope this helps. Good Luck.
Sharyl