With the tools and techniques available to us today, we should be able to deliver direct instruction far better. Start with a big, bright Interactive Whiteboard, they're all the rage in schools these days. Design some slick slides. Use a technique or two to help the kids retain your content. Pace it like a Pecha Kucha. The students minds (blank slates) should be filled up in half the time! That'll save plenty of time to work on the obesity epidemic!