| http://www.w3.org/ns/prov#value | - en in school, such as keeping doors locked and other security measures.Teachers should let children know that there???s nothing wrong with feeling scared and that the students can come to them to talk about their fears.He also suggested drills specifically designed for such an attack.???One thing we learned [from Columbine and other similar mass killings] is there are bad people in the world who c
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