Next race-a 1/2 marathon???

I don't think that one goes from running a 5k straight to running a 1/2 marathon! However, I believe that our SS teacher is wanting the class to sign up and go to the one in December here in SC. I can pretty much guarantee that I will NOT be running this 1/2 marathon but I do want to walk it. I think that in and of itself will be a challenge for me but I am up for the challenge. I have asked for another training chart and I am excited about the race. I would feel so accomplished if I could say that in 2009 I ran a 5k and participated in a 1/2 marathon!!