How great to have your trip overlap
Star Wars Weekend, one of my family's favorites! The itinerary for the activities aren't typically posted at www.waltdisneyworld.com, but sometimes they begin to spill out onto other unofficial Disney sites such as www.allearsnet.com and www.wdwinfo.com. After the first weekend happens (May 20-22), I'd check those sites to see if specifics have been posted. Also, if you are on Facebook, you can become a fan of Star Tours and see postings about the renovation of the attraction as it is about a month away from its reopening.
When you arrive at WDW, If you are staying at a Disney resort, you will be able to pick up a guide for the weekend's events there as well as at Disney's Hollywood Studios.
Disney Dad Marc has a great explanation
here for registering your son for the Jedi Training Academy.
Hoping the force is with you on your trip!