Just letting you know, when I called my school they said "you have to e-mail us" and hung up on me. I thought it was a bit rude, but I figure an e-mail is better because then they can put it in my file.
About Temple, just tell them that they are your number one pick, but I think it would be better if you e-mailed Temple if thats where you really want to go. Just write a quick one ask them a question about the school that they will have to answer back and then say "I'm really excited about my interview on ______. Temple is everything I am looking for in a d-school. I hope to exceeed your expections." That why they will know you are interested and its solid proof.