Chances are Anthony Pipkin was the only assistant principal in the country last year to put a stationary bike in his office and have students pedal it while he did paperwork and took phone calls. These kids from a Pittsburgh public school called Helen S. Faison Arts Academy weren’t in trouble. They had been chosen to participate in the Greenway Sojourn, a mass ride that would take 500 cyclists from 34 states off-road from Washinton, DC, to Pittsburgh. The eight-day ride would enter the city near their school. So the tour’s organizers, Rails-to-Trails Conservancy (RTC), had offered to host 10 students, ages 10 and 11, and their mentors on the Sojourn’s second half.