The following is from the Door Security and Safety Foundation:
The increased number of school shootings has created a growing public concern for safety in schools. Numerous opinions have evolved for improving student safety from an active shooter situation. In addition, several temporary door locking devices, or door barricade devices, have been made available with the intention of providing protection for students while in the classroom.
Unfortunately, these products fall short of the code requirements1 and often lead to unintended consequences. It is critical that these devices are vetted through the formal code process to ensure that the proper balance of life safety and security is met. There are already solutions in place in most schools and experts who can help you confirm if your school safe and secure.
How Do I Know If My School Has Classroom Security Locks?
Check that the classroom door can be locked from the inside without opening the door, yet still allow egress from inside without having to unlock it. The door must be able to be unlocked from the outside as well. These are common door lock functions that are tested and certified to the highest standards of security and safety, and consistently meet required fire and building codes in schools and to date have been effective against active shooters. If you’re still uncertain, contact a door security and safety professional to help evaluate your facility.