Lock Down

I have had parents ask about lock downs and when they occur.  We never know when they are going to call a lock down but we have them multiple times a year.  We tell the kids that we are practicing incase we were everyone to have the real thing happen.  I have explained to kids that we are playing hide-n-seek and we don't want them to find us.  Just an FYI....we had another practice lock down today.