Hi Sheila!
Honestly, I think that going to Walt Disney World with teenagers is even more fun than with young children. Sure, there is something magical about seeing your little tot's eyes light up when they first enter Fantasyland. But, there is also something very magical about sleeping later, not wrestling strollers, not having to squeeze in nap times, no cranky babies, and no toddler meltdowns! (just teenage meltdowns, but that's a different story!)
I couldn't list everything and fit it into an answer, so I will link you to some great information. Keep in mind that some of them are not official Disney websites and the information may be outdated, but I will include only what I consider to be creditable sources. (for the non-Disney sites, you will copy and paste the address into your browser)
1.
Filter Walt Disney World attractions by age. You can look at what is recommended for teenagers.
2.
Some great answers by my fellow Moms Panelists about traveling to Walt Disney World with teens. 3. List of each attraction's appeal to teenagers on Touringplans.com:
http://touringplans.com/magic-kingdom/attractions/teens-appeal
4. Tips for taking teens to Walt Disney World by Passporter:
http://www.passporter.com/articles/walt-disney-world-with-teens.asp
5. Best attractions for teens at Fodors.com:
http://www.fodors.com/news/best-attractions-at-disney-for-teens-5813.html
You guys will have a blast! I hope these help you plan, and please let me know if you have any other questions.