One young boy bowed his head, his eyes fixed on his old-school sneakers. Beside him, a seventh-grade girl who looked 9 clasped her hands as she looked to the ceiling, maybe ­beyond.

Side by side in Room 126 at TechBoston Academy, the middle-schoolers stood in silent remembrance Friday morning of victims of the shootings at Sandy Hook Elementary School. Many students wore green and white, the colors of the school in Newtown, Conn., in solemn tribute.