I think I'm getting too old for studying

Is there a time limit on brain capacity? Seriously? I'm taking my first standardized teaching test on Saturday, and it's amazing how hard it is anymore to stuff new information into my brain. I believe it's due to an overabundance of song lyrics and other worthless trivia accumulated in my misspent youth. No, really - I'm a great team member for trivial pursuit, but maybe not so much if you want someone to remember educational theory.