Michael, If we can personalize instruction, stronger students can work ahead, serve as peer tutors, or just work ahead. Weaker students can get needed attention from their instructors. Most days, I try to have planned "loose time" that I can use to stretch out my instruction if I need to, or use the time for group discussion, summarizing, review, or let student get a head start on homework. The flex time is great fo making adjustments when the class runs longer or shorter than planned. Barry Westling