A-school is your basic school to get started on knowing your job. Some corpsmen go on to a C-school if 1. they're grades are good enough 2. they choose one 3. one is available. Right now they're working on sending all Corpsmen to FMTB. That stands for Field Medic Training Battalion. It's to qualify us to be with the Marines [what you'll see referred to as the "green side"]. Somehow I'm attached to them if they want to deploy me, but I don't have the training .Don't know how that works. It's the Navy. That's all that needs to be said I guess. Anyway. FMTB is kind of considered a C-school. No one really calls it that. Some other C-schools would be Dental Tech. AVT. Pych Tech. Ect...

Hope that helps you out. I know it's difficult to understand all our Lingo.

The Navy is about to move the Medical training for all branches of the Military to TX. For now all Corpsman go to A-school directly out of Boot Camp in GL, IL. After A-school is complete the Corpsman will have an opportunity to go to a C-school either thrrugh their duty station or through good grades and hard during A-school. They must apply to the C-school with openings through their command.
Here is a link for you to look into just some of the C-schools offered to Corpsman. There is a wealth of info on this site. http://www.med.navy.mil/sites/navmedmpte/nshs-sd/Pages/Programs.aspx

I thought FMTB was C school so I was enlightened by reading the posts but also prepared that when my son said corpsman I knew that it meant at one point or other he would be deployed with a marine unit "Greenside." That was what he expressed to me. Thanks for the useful links Greg, I feel a more informed now.