What we need is the MEDIA to stop GLORIFYING and IMMORTALIZING these losers!

Key cards are a good idia,but they alone would not have worked in this case.The shooter would have used his mothers card.Putting the office by the mail entrance is good if someone can not get in any other way.Evan locking classroom doors would not have worked as the shooter could have gottin his mothers keys.It would maybe have saved a few kids not in that classroom.There is no one way.It will take many changes to improve the currant situation.

no need to arm all teachers, a students can always overpower a student! lock the doors-student ids should be key cards to get in building, parents have one as well. and make the front office be IN the entrance of the school and no one gets in unless you are a student or parent!