Podcasts are great when needing to listen to a lecture or educational piece later. When I was going to summer school, the classes were 3 hours long everyday for 5 weeks. My mind was blown and filled with information and had a very hard time writing everything down. I started to record the lectures in class so I could play them back later for notes and exams. I think recording the lectures for the students is a great thing. It allows the student to not forget key items that may have been otherwise missed or study more efficiently in case something was written down wrong. I love how in my masters program that is all online, we have pod casts and videos that can constantly be reviewed as many times as necessary.