I acknowledge that it CAN be used for good teaching, I saw it done. But I just don’t think teachers have gotten that much better, given how Power Point has ruined business presentations I’d even hazard a guess they’ve gotten worse. the post I originally replied to mentioned watching TV twice a week, I’m hoping that’s across multiple classes or at least a high school style 5 day a week class rather than college style 2 day a week class, because otherwise that’s just plain a lazy teacher.
The problem generally boils down to interactive. We know the less interactive the class situation the less the students will learn, it’s just part of the human condition. And the way AV of all types tends to be used it’s generally less interactive than a lecture format, which means less will be learned during that class session. And trying to maintain interactivity when using a TV is fighting one of the basic aspects of the device, we know TVs encourage brain disengaged semi-sleep state.