I can't vary the mathematics, but perhaps we should experiment with the format. Students hesitate to stand out in a large anonymous group, but I have read about the successful use of flash cards and class votes. It will not be possible to assume that students have watched the lectures in advance. Of course I hope the tapes will be a complement to lectures and not an alternative. The new situation offers more freedom, but with it come change and uncertainty.
Every innovation implies an altered set of rules.
Most definitely, students have learned to deal with the old rules. After long acquaintance, they more or less accept those rules as fair. Any alteration implies that somehow or somewhere, an extra effort is required. This is not so welcome. I have no means of compelling students to attend class, and don't want any.