I want to call the cops on young kids not in school
Do you have any specific problems with the students that are not in school?
I had a bad experience with some student who had been on the street. He kept skipping classes and getting punished for his disobedient behavior.
While I feel like you have the best intentions for these kids to not skip school, I don't think that it is necessary for you to involve the cops against them. There are different things you can do to help them go back to school. Try to maybe contact the school's principal, or someone that works with child services as they may be able to help the children better.
I think that a child that is missing school on purpose needs assistance and help from an authority figure.
Still, calling the cops on kids seems excessive, You might ruin their lives. See if you can talk with them or contact their parents to see if they know their kids are skipping school.