The U.S. Department of Homeland Security has updated their Active Shooter Preparedness web page.  
On the page you can find links for the following areas of interest:
 
-      Active Shooter:  What Can You Do Course
-      Active Shooter Webinar
-      Active Shooter Workshop Series
-      Active Shooter:  How to Respond Resource Materials
-      Options for Consideration:  Active Shooter Training Video
-      U.S. Secret Service Active Shooter Related Research
 
http://www.dhs.gov/activeshooter  
 
We hope you find this information useful and will share it with family and friends.  Take care.