There are 67,000 public elementary schools in America as of 2010

[Lurks Often]

8. Funding

1. Eliminate foreign aid to Egypt, Iraq, Afghanistan & Pakistan immediately, that'll raise $17 billion, I'm sure other countries can be added to the list.
2. Legalize and tax marijuana, use that money from that toward school security,
3. Release non violent criminals such as drug users, some white collar criminals, tax fraud, etc
4. Change laws so that use of a firearm in commission of a crime results in mandatory time that can not be plea bargained away or receive probation. Possession of a firearm = 5 years; brandishing or threatening = 10 years; firing it = 15 years; anyone injured by the firearm = 20 years; if someone dies = life without parole. The costs of this will be offset by the release of the people in #3 and we may even see a savings as career criminals stay locked up and others are discouraged by the long prison terms.
5. Installation of bullet proof glass on all exterior doors
6. Installation of bullet proof glass on all exterior windows as funding permits
7. Classroom doors reinforced