text: do high school grades really matter for college? well cuz i was lazy this year and want to know if i still can go to a god college they only matter to get in, but they also take into consideration extra curricular activities, sat's, the essay and other things that make up the application, not just your grades.  i had nearly no extra activities outside of school and i got accepted to a very good school.  granted i only went for a year before i realized it wasn't the place for me, but still.