Same experience 17 yrs earlier and not in the US. Went from breezing through high school calculus and physics, to completely floundering and flunking out the fi

Same experience 17 yrs earlier and not in the US. Went from breezing through high school calculus and physics, to completely floundering and flunking out the first year of university. The gap was enormous - probably another 3 years of learning at the high school pace.