They are based on rooms available and some requirements of state law. That building gets grades with students needing them. Another building has more rooms close to ground floor. They get K when possible. The gym is on a separate level as is the cafeteria.
Nothing is on ground level.
We have a senior citizen tutor program, but many senior students cannot help because your cannot enter the building without going up a flight of steps. She is in a 2-3 room, and has had a lot of advantages. This was especially important to Sheli since we moved from Illinois to Colorado at the beginning of the school year. Because the students have two years in the same classroom, there is more continuity to their learning than they might otherwise have. The students move around the four rooms with little thought for what grade each of them is in.