OK, if I am you, I do this:
I-44W until it hooks up with I-35S for a bit.
THE 35S/40W AREA IS UNDER CONSTRUCTION.
So what you're going to do after I-44 meets up with I-35 (theme park on the right) is get in the right lane and continue on I-44 Westbound when it splits from I-35. You'll exit right. It'll seem like you're not doing the right thing, because I-35S keeps going straight and I-35S goes to Norman. But trust me.
Exit to the right to stay on I-44W.
Stay on I-44West for several (about 4 or 5?) miles until you get to I-235 South. Take THAT exit. Should be a right exit, I believe. There is a little construction around there, but nothing like the traffic at the 35S/40W interchange.
When on 235S, you don't have to do anything until you're close to Norman. Just go by the Capitol and downtown, through the southside and through Moore.
Once you're getting through Moore, mosey over to the left lane.
TAKE THE HIGHWAY 77 LEFT EXIT. You'll avoid a lot of traffic this way.
Go straight through several miles of stoplights.
At Robinson Ave, the highway turned into "Flood Ave".
Go straight onto Flood.
Go about two miles and you'll be on the corner of campus, Boyd and Flood. Pay someone to park ($20-$25), and follow the crowd.