I disagree, last year I was struggling a little bit, I didn't use newschoolers at school. This year, a junior in high school (the hardcore year), I'm on it all the time, while I hardly complete homework, I just got a perfect score on my AP Calc final.
I was talking about the "hardcore" year of high school, not the hardest year of study in your life. High school is a drag though, doesn't matter where you go.