I've mentioned before that I have a lot of students this year (27 per class average) making visibility a problem in the dark recesses of my room. With the kids piled on top of each other, those stuck in the last row do an awful lot of stretching to see, especially when I write on the lowest 1/5 of my board. Enter my solution:
People who know me aren't surprised, but yes, I might be a crazy person. The setup is a 1080p 32" television that was marked "Used" on Amazon, but was brand spanking new. To enable the use of my podium, I had installed a 4-port VGA splitter already, so this screen takes up the 4th port on that splitter. A 50' VGA cable, cheap IKEA table, and cord proctector later, the back of the room isn't so terrible anymore.
The top picture was taken from a desk up against the back wall of the room. Normally this kid has to look around 4 or 5 people in front of him to see, and you can imagine how difficult it is to see anything in the bottom reaches of the main board. Now this kid only has to fight one person for a decent view. I increased the distance between the front two rows and the last two rows a bit to increase the reach of this new screen. I'm hoping it's a beneficial addition. Pretty sure the kids will flip out when they see it.