This article makes the bold statement that reducing class sizes raises achievement levels. Thank goodness someone is out there with a 21-member research team studying this subject! We teachers never would have known that, otherwise.
My favorite part, though, is where the guy from the think tank says he's not so sure about that. I wonder if he's ever had to try to think in a metaphorical tank with 30 kids ranging in age from 13-14 years old. I'd be willing to bet that it's easier with 15 from the same group!