OKLAHOMA CITY, OK - An Oklahoma School is now adding "intruder drills" following the Newtown, Connecticut tragedy.

At Chandler's Park Elementary in Oklahoma City in addition to their fire and lockdown drills students are now going through an intruder drill.

The drill includes turning off the lights moving kids so they can't be seen from a window and possibly moving students into locked closets.

The drills not only prepare students but allow administrators and teachers to evaluate their procedures.

Principal Tracy Fredman says the drills have led to changes including eliminating elaborate codes that would tell police where the problem may be.

Just down the road the Wellston school administrators are considering a similar drill.