Mercifully, the Celtics’s season is over, but Jared Sullinger is staying busy. This week, the power forward, who was one of the team’s few bright spots, joined students in the new computer lab at McLaughlin Middle School in Manchester, N.H. The lab was completely subsidized by a partnership of the Boston Celtics and Southern New Hampshire University. Students pictured with Sullinger are Makenna Platte (center), Ashley Godzyk (left), and Paige King.Mark Shanahan can be reached at firstname.lastname@example.org. Follow him on Twitter @MarkAShanahan. Meredith Goldstein can be reached at email@example.com. Follow her on Twitter @MeredithGoldste.