More and more teachers today are using PowerPoint slides in their classes. The students get copies of the slides to study.
The first time I had come across this style of teaching was in graduate school. I suffered greatly from it. I was accustomed to having to take notes from scratch. The writing would help me retain the information. When given the slides I would try my best to write as much down as possible. However, after a short while I found myself writing less and less for two reasons. 1. The professor would fly through the slides quickly. This is expected to happen because he is not writing anything and just reading. 2. Why write when everything is right there anyway? it made me lazy. Lazy is definitely not good!
Maybe it's just me, but I really liked the 'old school' teaching. Having the teacher write on the board. Taking notes in a notebook and having them all organized the way I wanted them to be.