Apparently Medium Doesn't Matter

I stumbled onto this gem while searching for chalk-talk teaching methods.

Shallcross, D. E.; Harrison, T. G., “Lectures: Electronic Presentations versus Chalk and Talk – a Chemist’s View,” Chem. Ed. Res. Pract. 2007, 8, 73.

Overview: From the findings of several questionnaires and interviews, the authors contend that the “method of delivery (i.e., PowerPoint vs. chalk) has no significant impact on learning outcomes.” Moreover, they maintain that preparation plays a central role in lecturing.

My thoughts: I’ve personally witnessed that students are less focused and more likely to sleep when they’re shown a PowerPoint presentation in a warm, dark lecture hall. My classes usually involve chalk, though I'm beginning to work PowerPoint in...especially in cases where I have to present data, show an instrumentation diagram, or need to illustrate a periodic trend.