[sdiy] source for many, small, simple PCB's ?? for educational use

[Steve Maietta]

All,
  I teach HS level technology here in the US and do a unit on electricity/electronics.  I want to get a whole bunch (200 perhaps) small(around 2"x2") PCB's made and would like to know the cheapest source.  Single sided, no solder mask, no through plating - whatever it takes to keep the cost down.
These would be general purpose boards for 555's and include small area for other components.  I might also want to do a similar thing for an op amp.
I know I could etch myself a lot of them, but the drilling would be a killer, and I want my students to have sucessful projects, not learn the intricacies of drilling with .030 drill bits...

I know you guys have used lots of places for your projects.. Any suggestions/ideas for cheap PCB fab?   Or should I just use perfboard..?

thanks
~Steve