MARLBORO - In the wake of the tragic Newtown shooting that left 26 people dead, the Marlboro School district has decided to make a major change to its security procedures.

Starting on Jan. 2, armed police officers will stand guard at the front door of all nine schools in Marlboro. The district also plans to replace all doors with bulletproof glass.

Marlboro Mayor John Hornick says everything changed for him and many other parents after the Sandy Hook Elementary School shooting. He says the school district must provide the greatest level of protection possible.

For the next 90 days, Marlboro police will assess and address the security needs at each school building and will deal with the costs down the road.