Go to the single driver website at http://melhuish.org/audio/index.htm Talk about keeping it simple! Inexpensive too. I am playing with the discontinued 4 x 10" 40-1297 full rangers. These are $5 each and make music.These won't have the deep bass that highschool kids might like but for not much money you have some really good sounds. There are plenty of DIY articles on the site using speakers from other manufacturers ( like Fostex ) as well. Highly recommended
Inexpensive DIY Speakers
I have a friend that is a shop teacher that wants to put together a project for students. The idea is a good 2-way in a moderate to large enclosure. We're trying to keep the cost down. The students will build the cabinent and do most of the construction. The drivers don't need to be audiophile quality, just good.