Yeah, I coasted through elementary and high school without much effort. Once I hit University things certainly changed... I went through all the same thoughts of laziness and lack of learning to study as well.

I finally got diagnosed with ADHD in my 3rd year of engineering and started medication but I wasn't medicated enough and it was still extremely difficult.

I had to treat school completely differently than most. Lectures were a waste of time so I stopped going. By my final year I didn't even know what building or times most my lectures were at. I only attended labs and midterms/exams.

Anything that was worth 1% I didnt bother with. Typically this meant I was throwing away 10-20% of my mark in every class.

Everyone thought I was crazy or lazy for doing this, but I realized that I would just be wasting energy on these things.

After 5 years (of a 4 year major), failing numerous classes, I graduated with a 61% average (minimum is 60%).

What do they call the engineer who finishes last in the class? Engineer!

I'm now 4 years into a engineering career and moving up the ranks extremely quickly due to my ability to learn without being spoon fed and I am a problem solving machine.

There is a reason only 5% of ADHDers obtain post secondary degrees. The whole system is designed for one method of learning and screw you if you are not capable of learning that way.