Why are teachers still using TV's in the classroom?

As I was writing my post from yesterday on Roku boxes, it occurred to me that there are teachers still showing movies and such on televisions. TV's had their place long ago. But even with the larger screen televisions that are out there today (and most are not built to meet the demands of a classroom-just look at your flat screen at home) I don't understand why teachers are still using them if a computer and projector are available. A typical classroom has anywhere from 25 to 32 students in it. Unless you are using a 60" screen, the kids are not going to be able to see it. And, let's face it, most sound systems on televisions leave a lot to be desired. Why do you think there are so many sound systems for television viewing out there. So you have 30 kids in a room watching a TV of questionable size, straining to hear what is being said. Let's maximize the viewing experience for the students. You will need 5 things. 1) a big screen for your room. Go with one that is 100" by 100". Sounds big, I know. And it will be when you get it installed. They won't be much more expensive than smaller screens. Do you have a whiteboard or smartboard in your room? Then use that if it's big enough. 2) a computer that you can stream the videos from the Internet. 3) a projector that you can connect to your computer using an VGA cable (you should have received one with your projector). 4) some really good computer speakers that have a nice base sound and can project sounds well all over your room. 5) an audio cable to plug into your computer and your speakers (some speakers already have one connected to them so you don't need to buy). If you want to be able to use your projector to watch DVD's and VCR tapes from a machine, you can also get an adapter/splitter to go onto audio cables on your DVD/VCR in order to plug the single audio cable into the back of the two audio plugs on your DVD/VCR. The best place to go for cheap cables (again, in my experience only) is Cyberguys.com. They have lots of cables and the prices are reasonable. Make sure you get the right adapter, either an female or male connector. Check your DVD/VCR machine and the audio cables you have before buying. There is one drawback to this. Many of the projectors that are in classrooms right now do not have high definition and the lumens (strength of the light) are not very bright. So you will have to close those drapes and block out most exterior light because the picture will fade out. You can turn the brightness all the way up but that may or may not help. As teachers we know that we have so much to compete with to get kids' attention. This is one more weapon that we might be able to make use of.