NIKKI BATTISTE: This is the point of view of an elementary school principal firing at a mock gunman during a simulated school shooting. He's one of more than 1,000 educators from 12 states to take this three day firearms course in rural Ohio called FASTER Saves Lives.

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Funded by a pro-gun group and donations, the training is free and began after the massacre at Sandy Hook Elementary School nearly five years ago. Abbey Clements' 19 students survived, and now she is one of a dozen Newtown teachers fighting to keep guns out of classrooms. 

ABBY CLEMENTS: Never in a million years would I've guessed that one response to what happened in our town would be to arm teachers. It's absurd. God, can you imagine if children were hurt by you in that situation? How would you live with yourself?

BATTISTE: In fact we saw just that scenario play out in this simulated classroom. During this training I saw one person shoot what would've been a student in this scenario. When you see that, does it make you second guess this choice to have guns in schools?

ELEMENTARY SCHOOL PRINCIPAL: No, it's an accident. We might take one, but we might've saved 30, 40 other kids.

Previously:

How the NRA exploited hurricanes to promote gun ownership

What's missing in the media conversation on gun violence