So the first 3 police officers and the deputy who decided to wait were trained and ready to take on the shooter? If so why didn't they?

I have no idea, they decided to not do their jobs and should be fired and put in prison for breaking their oath.

And quite a few students did get away before police arrived.

Through no effort of the police I might add.

That's the police, I'm talking about the teachers

Hold up because now you've completely changed your position. First it was the police aren't trained to handle shooters so they did nothing wrong. Now its teachers can't be trained to handle shooters so they shouldn't be armed.

Make up your mind.

you can of course train the teachers like police officers

No one suggested that not even Trump. You really need to stop making strawman arguments. This is what is proposed:

Allow CWP holders to conceal carry in schools if they are an educator

That is it. It is not easy to get a CWP and most states have intensive background checks to even permit an applicant one. That's after the required training courses.