It's good to have a consistent theme that has to do with education. Let's revel in it. This week's episode is about classroom presentation devices. The gents try to get televisions back in the classroom, and offer up some compelling arguments. Along the way they present a brief history of projectors and TVs and look at a 4k future. Along the way, the bulb-less Casio is thrown in the mix. Trust me it's more fun to listen to than to read about.