Advantage for learning english on the net instead of teacher teaching:
We can search what we want to search for
The internet is mostly correct
The net is fast and very convenient.
The net is always there and you and go on it whenever you want
Disadvantage for learning english on the net instead of teacher teaching:
If we don't have internet we don't cannot go onto the net to search for things
The teacher may know better about some stuff then the internet does.
The internet may be fake
The internet may contain inappropriate things.