Publishing Lectures?

Right now, I’m rethinking how to post class lectures since my lectures have changed a lot.  I used to screencast, that is write lesson notes on the screen from scratch every period using a TabletPC, record my screen and voice, and post it all as an embedded flash video on this blog.

PowerPoint changes things.  My biggest concern is copyright issues.  I cut and paste a lot of material from our Glencoe textbooks into the slides.  So if I share the slides, I might be illegally publishing copyrighted material.  Anyone know the law on that?  Fair use?

Screencasting also doesn’t work as well since there’s a lot of deadspace in the time it takes for students to copy notes.  Who wants to watch a lecture with 1 to 2 minutes of silence after each slide advance?  I certainly don’t want to put in any time with post-production trimming.  I guess I could print handouts that make note-taking a lot faster.  But I hate to consume more paper than is absolutely necessary.

The other option I’ve considered is a 5-minute lesson preview/recap.  I could post them a couple nights before a lesson so that students can get a jump on upcoming content or review it when getting down to the homework.  Again, my time is of the essence.

Something’s gotta give.  I’m leaning towards the 5-minute preview/recap.  Thoughts?