The playground company's rep can help you with the sizing of the equipment re: # of students etc.. we had a meeting with the rep and the head of our grounds dept. and it all worked out great!
Sarah-
I just posted this question on our
Facebook page
to see if I could get you some help over there. There are a bunch of responses already. Let me know if you'd like me to copy them over here.
Thanks so much to everyone who has jumped in to help Sarah!
Order catalogs from the various playground companies. Start in the PTO Today Yellow Pages to get to the various websites. All of the catalogs that I've seen (in recent months, as we just did this) included the number of children the structure was appropriate for. Hope this helps!