A while back, Mike Pulsifer pointed me to an article on Ars Technica: Study: class podcasts can lead to better grades.

The article, and the research done by State University of New York, focus on whether using podcasts as an extra study resource for students can improve grades. I am a huge fan of podcasts. Over the past couple of years I have learned an immense amount by listening to podcasts – from language, to photography, to brain science, and design. On iTunes U anyone can access lectures from some of the best universities in the country by downloading and listening to podcasts of each lecture. This is a great way to acquire knowledge or to get further study for a class you’re currently taking.

What I found even more interesting about this study was the method of teaching and study that wasn’t as effective: handing out printed copies of the lecture slides to students. As the author of the article notes, passing out PowerPoint handouts has become “all the rage” in many lecture halls, within or outside the academic world. In fact, two of my previous science courses are designed around PowerPoint handouts – every slide of every lecture for the entire semester is included in a “Lecture Guide” that the students purchase at the beginning of the semester (sometimes in lieu of a textbook).

A printout of common lecture slides is not much different than the lecture – except that you probably aren’t having them read to you by a Ph.D.

But repitition increases recall, right?

Yes, that is true, but do not forget that certain modalities of learning are less effective than others. As Dr. John Medina points out, “the brain sees words as tiny pictures. Reading creates a bottleneck.” (Brain Rules, pg. 234)

This is just one more reason to do away with text on those lecture slides, replace them with images, and maybe even replace the handouts with a link to the podcast version of your next lecture.

I used the slides below for a presentation I gave to an advanced writing course this past September. It was created in Keynote and I presented it using the Pointer app for the iPhone as the clicker.

It won’t make much sense to you by looking at the slides alone, because these slides were simply a visual enhancement to what I was saying as the presenter. This is an important concept to remember when designing your own presentations: the students should pay attention to you, the teacher, and should only refer to your slides when you want them to.

I am working on a stand-alone presentation for Slideshare that will introduce Brain Slides without the need for my explanations as you click through the slides. I will post it soon!