You will take several sets a day at most schools. Ask for a different coach for each set the first day. Then pick one coach for the rest of the week. You will know which one. By sticking with one coach the rest of the week, you allow them to get to know you, to understand you're needs and wants and you will begin to understand more as the week progresses.
My advice for a week of ski school (and it is just that)
1. Have fun, its vacation time in Florida and your skiing, really!
2. Put a video device (WITH AUDIO) in the hands of an observer (not your coach) while you ski. Ask your coach to talk about your pass as you ski. This video can be used long after you have left school and have forgotten what your coach taught.
3. Discuss your morning set(s) with your coach during lunch/mid day break/whatever. Take notes in the note book you brought with you. It is school, right?
4. Same for afternoon set(s).
5. At night, before going to sleep write down everything you remember from the day. Again long term use. Also note conditions, ski settings, etc.
You will be bombarded with great information during a week of school, a lot of which you will forget, especially if you follow step 1 above. You will not come home after a week of ski school skiing like the pros, not that you are expecting this. But none of this information will be worth a dime unless you go home and practice. Video/Journal will assist you while you practice and develop your skills. Allowing you to work on one thing at a time.
If you decide to visit several sites/coaches try to get video at each and DO take notes regardless.
whatever you decide don't miss out on #1 Have Fun