I started at RPI in 1966. I came from a Western state, where calculus was generally not taught in high school. Certainly not in mine -- and in retrospect, I can't believe they admitted me.
Well it sure was taught in New York, and as over half the class were New Yorkers, they hit the mathematical ground running. Only it turned out that we didn't have ONE calculus class, we had FOUR: Calculus, Physics, Chemistry, and Mechanics. Somehow, after three semesters of that I was still there with my C average. I got a C in Diff E too -- but it was a lot less stressful somehow.
At the time, there was a common pre-engineering curriculum, in which EVERYONE took the same five courses, and one humanity (huh? whaffor?) elective, each semester for the first three years. So chem, electrical, computer, mechanical, aeronautic, nuclear, and even Engineering Science, whatever that was -- all had the same five courses. I remember sitting in Fluid Mechanics studying steam tables -- STEAM TABLES !! -- in my fourth semester, pretty darn sure that 98% of us would never look at that stuff again. Another Mercy C, I think.
Somehow, I managed to make it out alive. They just re-postponed the 50th reunion.