I think someone asked that before. Sorry if it was you and I didn't get back to you. I have been busy with construction that has come to a grinding hault waiting for the city, so I have some time to kill now.
I found the pizza school by contacting Caputo. Antimo Caputo told me that Enzo Coccia, in his opinion, offered the best school for authentic Napoli pizza. I was originally going to go to the course offered by the Vera Pizza but they cancelled it. I found out while I was in Napoli from the Sec. of the VPN that they actually have never had a course. They can only do it if they get 20 people to register. Enzo will not take more than 5 for a course, so it is very hands on. The full course is 3 weeks long, but if you don't have that much time he will work with you. There was a chef there from Japan who could only stay a week.
I will support what Marco has said before, thinking you are going to go for 3 weeks and come back a master pizzaiolo is very disingenous. These people work for years and years mastering their craft, Enzo has over 30 years of experience and he says he is still learning.
If you have any other questions let me know, right now I am off to the city again to fight the good fight.