Office hours: Tuesday 10:30-11:30, Thursday 10:30-11:30, Friday 10:30-11:30, in McNeil 519 or by phone at (215) 898-1507. (I give preference to those physically present.)
I hold official office hours only during fall and spring terms, from first day of classes through last day of final exams. (Academic calendar here.) However, I am typically available throughout much of the rest of the year, with the same schedule. If you come to in-term office hours but don't find me, I'm likely at Penn but temporarily away from the office. If a few minutes pass and I don't return, please call me at 610.416.5997.
In-term office hour cancellations/modifications: Office hrs April 7 10:30-11:00. No office hours April 24, April 30, May 12, 14, 15.