After all, eEducation is based on enabling every student to understand what they can do and what they cannot.

It is important to be confident to some extent about what you are good at and to be modest and learn about what you are poorbad at.

"poor" is absolutely fine, but "bad" or "not good" would probably be more common.

If you can be in a highobtain status only bythrough showing off your ability, the society you arlive in isa stupid society.

This one is a bit complicated! "high status" works but you can just use "status" and people know you mean high status. You generally 'obtain' status - 'be in high status' is ok but feels a bit heavy. You could also say that someone "is of high status".

If you can be in ahold high status only by showing off your ability, the society you are in is stupid.

Alternately, "If you can be held in high status..." or "...receive high status..."

After all, eEducation is based on enabling every student to understand what they can do and what they cannot do.

"After all" is used to elaborate on ideas or to give explanations, so starting a piece of writing with that doesn't really work.

If you can be inenjoy a high status in it only by showing off your ability, the society you are in is stupid.

"Only" can work, but depending on your meaning, something else may work better from a stylistic perspective.

After all, eEducation is based on enabling every student to understand what they can do and what they cannot.

It is important to be confident to some extent about what you are good at, and to be modest and learn about what you are poornot good at.

I wouldn't personally use "poor" there, but maybe some other natives would.

If you can be in aattain high status onlyjust by showing off your ability, the society you are in is stupid.