The board of trustees has approved tuition increases for next year. Tuition for undergraduate students enrolled in the Trinity College of Arts and Sciences and the Pratt School of Engineering for the 2008-09 academic year will be $36,065, up 5 percent from $34,335 in the current year. The total cost to attend Duke, including room and board, will be $47,985, an increase of 4.8 percent from 2007-08.