From the College Park Metro station take the free University shuttle bus leaving from the EAST side of Metro station (main exit). The bus runs on Thursday and Friday all day about every 30 min. (You can see a service schedule for the University Shuttle system here; during the days of the conference, the bus will be running on the weekend schedule.) There will be no service during the weekend of the conference. In order to get from the Metro station to campus on these days, we suggest either taking the Washington DC Metrobus or walking.
You can also walk to campus from the Metro station (about .8 mile, 20 minutes): Take the underpass to the WEST side of the Metro station and walk west on College Ave., see map. Following College Ave. (which becomes Regents Dr. after crossing Route 1) will take you the traffic circle with the big "M" where the Math building is located.