Bellamy Dawkins-Morris, 5, died after a 120-pound digital display board fell on him just after 11:30 a.m. Wednesday at Riviera Elementary School in Palm Bay.
School staff called 911 and gave first aid before Bellamy was taken to a hospital, while police said the board tipped over as he was moving it in the classroom.
Brevard Public Schools said the Promethean board had been wall-mounted by a licensed third-party vendor under manufacturer guidelines and that all district boards from the company are now being inspected.
Palm Bay police's special victims unit and Promethean are investigating the incident, which family members said involved Bellamy, who was autistic, pushing the display back and forth.