PRESS PHOTO COURTESY THE SWAIN SCHOOLFamilies from The Swain School, 1100 S. 24th St., Allentown, volunteered for the national Day of Service Jan. 15, in honor of Dr. Martin Luther King, Jr. About 125 students and family members participated at five sites, including The Gress Mountain Ranch, Orefield; Flint Hill Farm, Coopersburg; 6th Street Shelter and The Literacy Center in Allentown; and a site