..You do sound ADD likely O_O Taking stuff conscious yet unconsciously is quite common among people who're under pressure, like school days, campus life.. But to forget a homework, I trust you that you're a good student, and you do work neatly yet.. You've missed the deadline and apologizing to teachers. I get you. You may have ADD symptoms.. You want to concentrate in class, you did, yet in the end, you're pondering as to why you couldn't recall what has been taught? Until you asked a friend and went "Oooh yeah that!"

Also, ADD affect all IQ range. You can be smart and at the same time having ADD. That's what my psychiatrist told me.

If you have time, try reading my biography on my profile.. It's a message I sent to my psychiatrist. It could be of help. ^^ Good luck! And work HARD.