HOW to ignore IGNORANT people ?

im in last year of high school and there are some f****** c**ts in my year. everyday, i get insults, patronising me, making fun of me etc etc...now i have looked at it very deep, these "people" hang around in a "thug" group, and have very low grades and NO future goals in life, but they still keep on p!ssing me off. ive tried ignoring them and not reacting, any more tips ??