METHUEN, Mass. (AP) — A 10-year-old boy has been arrested after police say he shot a BB gun at two school buses full of children in Massachusetts. Police say both buses had about 63 students aboard in grades K-8 when they were shot. Located at One Ranger Road, Methuen High School has an enrollment of 2,000 students in grades 9- 12. The high school offers a broad range of. METHUEN….