I was on Ritalin when I was in elementary school. I don't remember when I started and ended. I think it was from the 3rd grade to the 5th grade, dunno.
As for where kids go, it was originally at least 10 cities attending one district. Pretty bad, eh? However, the community wasn't too big and students managed to get through fine. It did become a problem years later and they finally decided to split into two districts.
For instance, all kids from 10 surrounding cities attending the same elementary school... junior high... and high school. There was usually an average of 3 to 5 deaf kids per grade level. There was also usually 1 or 2 from each deaf group that could be involved in mainstream class.
A few years ago, they realized that there were more deaf students and felt the need to split. Now, the first district is one city below and supports deaf kids from surrounding cities towards the south. The second district is one city above and supports deaf kids from surrounding cities towards the north. The old district continues, but only if kids and/or parents choose to stay at those schools. If they decide to leave, they will be sent to their assigned districts. No going in, only out. Once all deaf kids are gone, there will be no more deaf programs in this district... just the two new north/south districts.
In a way, I think it's great. I've heard that a lot of those alumnus have returned and are now teaching at those districts. So, there are more teachers available for those deaf students.