Sometimes our efforts to deliver engaging content are faced with unique challenges. We should not become discouraged when the end of course surveys are returned with mixed results. Reviewing less than desirable deliverables and hardly perfect assessment results should not hinder future revision. These are opportunities to try new things within our courses to address these minor shortcomings.
When it comes to everyday instruction and learning activities, everybody - that includes you and your students - benefits from a little variety. If your students don't seem to be interested in a lesson one day, try coming at it from a different direction the next day.