Where am I supposed to get an "adult background check" for school. or a "juvenile background check"?

go to a police station for every county you've lived in for the last 5-10 years and ask them to give you a letter of criminal background. if you have no record then they should issue you a letter stating the same. if you do have a record then make sure you all have doents showing the charges and that the case has been disposed of.