NEWTOWN, Conn. (AP) — With security stepped up and families still on edge in Newtown, students began returning to school Tuesday for the first time since last week's massacre, bringing a return of familiar routines — at least, for some — to a grief-stricken town as it buries 20 of its children.

One 6-year-old boy's funeral was under way Tuesday morning, and two other 6-year-old boys were laid to rest Monday in the first of a long, almost unbearable procession of funerals. A total of 26 people were killed at Sandy Hook Elementary in one of the worst mass shootings in U.S history.

Classes resume Tuesday for Newtown schools except those at Sandy Hook. At Newtown High School, students in sweatshirts and jackets, many wearing headphones, betrayed mixed emotions. Some waved at or snapped photos of the assembled media horde, and others appeared visibly shaken, one with his hand to his brow.