One thing is trying to function on an empty stomach, another is trying to do anything at all without drinking water all day. It got to be kind of a problem here in Norway, especially when Ramadan ended up falling in the middle of summer where we end up with 18-22 hours of full sunlight, depending on how far north you are. People were trying to eat and recuperate in between prayers in the 4 hour window between sunset and sunrise, and that's down here in the south where it's generally not as severe.
Eventually some imams got together and decided that Muslims in Norway should really only have to adhere to the spirit of the time, and should treat Norway as having the same day/night schedule as Mecca.
Personally, I think that's great. It's kind of a mean thought, but I figure it's a great step towards moderation and eventual secularism. The more that people agree on the old rules being outdated and unnecessarily rigid, the more people move away from extremism and choose for themselves to break away. It's selfish of me, I know, but I feel like it's to be encouraged.
Heck, the more conservative folks here have been paranoid about there being a government-funded mosque popping up somewhere. I say might as well go ahead, look at what state sponsorship did to the Lutheran church here, they're a bunch of damn kittens... Least extreme people around, and hemorrhaging members in a constant stream.
I don't think I've heard anything about concerns regarding Ramadan affecting high school exams here, but then again there's already an ingrained tradition for the students to go on a month-long bender right over finals anyways, so the Ramadan-observing students probably have a leg up on the situation.