way to get around router kick off internet?

[Tony RB]

The router has been set up to allow your MAC address to connect during certain times, then disallows connection at all other times.

This is called MAC filtering.

http://en.wikipedia.org/wiki/MAC_filtering

"until he graduates college"

Go to the college library to do your studies if you need to use the Internet after 6 pm.
You can also meet classmates there for study groups.

The Internet is not the real world, so spend your evening hours with other people when you are not studying or working. Person-to-person networks are how the world works.