TeacherBailey - I used to have a full time aide. At the time I saw double classes - up to 50 at a time in a class. When I stopped having double classes I stopped having a full-time aide, but for things like this 70 member guitar class and my 200+ choir I had an aide just for that time period.
Now with the recent budget cuts I'm still expected to do the large groups - including those double classes again - with no aide. Makes for quite a challenge!