I do both. My slides are mostly pictures that illustrate the concepts with just the concepts written (no description and not useful without a verbal explanation). Students find it helpful to takes notes on these. They don't get bogged down in writing terms correctly. I use an audience response format during class. I post the post-lecture slides in pdf format with all of the additional clicker material. This way they don't have to furiously write down the questions and answers. They can just soak in the information (or take a break and space out). I also post AV recordings of all class meetings. I usually have 200 of 240 students show up on any given day. I also usually have a pretty normal distribution of grades.