So 100 is an average IQ. They will actually change the scoring to keep it that way. 115 puts you 1 standard deviation ahead. 125 or higher puts you in the top 5%.

I was similar in high school and college. I wasn't good at studying and hadn't needed to in high school. I had a rough first two semesters in college going on academic probation.

I was able to adjust in time and put the work in to pass but it could have gone either way. I tended do the best in my hard class because I put the most effort in those at the expense of my easy A classes hurting my GPA.