What can i do for a really nice gift for my math teacher's end of the year present?

alright, so this year (my freshman year of high school) my algebra teacher was simply amazing. there's no other way to describe him. he helped me both academically and personally; mr. dion was basically another father for me. i really want to do something SPECIAL for him this year because he went way above and beyond the call of duty. he really showed me and every solitary kid in my cl teaching was his pion and his calling- he constantly encouraged and helped anyone he encountered. therefore, i really want to get him something special as an end-of-the-year thank you gift; the usual card or whatever doesn't seem good enough. also, he has multiple sclerosis and that makes me want to give him something even more special because he keeps fighting and is the most happy, upbeat person ever. i know he really likes sports (we live in new england so pats, red sox, etc.) and is a military vet. i don't have much money but i'm willing to put a lot of time into this. any ideas? THANKS!