Read the rubric! I’m at SNHU, so ymmv at other schools, but read the rubric. They grade to that, and it doesn’t matter how exceptional your work is, if it doesn’t meet the rubric, you’re boned. If it’s mediocre and meets the rubric, it’s at least a passing grade. Other than that, utilize any extras your school offers. Snhu offers tutoring, both schedules and drop in, writing labs, all kind of academic help. If you’re ever struggling, call your advisor and let them know. They can suggest things to help, or potentially even get you withdrawn from a class you know you won’t pass.