I'm not joking. I'm 13 and not on any steroids or supplements, and I can curl approx. 5 pounds more every DAY. I progress just about as equally on other lifts too.
Lol bro this is a 6 year old thread. Try to watch the dates.
But yes for quite a while you should be able to add weight every time. Look into Stronglifts 5x5. That is the best base you can do. Especially at your age.