Go to this link:
http://www.dreamsunlimitedtravel.com/dreamsres/sd.cfm
You can plug in your dates and choose the discount through the drop down menu. You don't have to book through the link. it can give you the rates though.
Also, if you call 1-407-934-4000 or 1-888-828-8850 which are the S/D reservations lines, the reservations person can tell you if those rates apply for your dates.
You can also get quotes directly from the resort, here. The links for teacher and nurse rates are on the right side of the page.
I am a teacher and I've always thought about staying at Swan or Dolphin. When I plugged in our dates the rate was $169 for teachers but $151 for AAA so I' m glad I just rented DVC points for our trip. Any discount is good but I was surprised that AAA was a lot cheaper. Be sure to check that too if you are a member.