1. School delinquent. A minor under seventeen years of age, required by any of the provisions of part one of this article to attend upon instruction, who is an habitual truant from such instruction or is irregular in such attendance or insubordinate or disorderly or disruptive or violent during such attendance, is a school delinquent.
2-a.b. Disruptive pupil. For the purposes of this section, a disruptive pupil is an elementary or secondary student under twenty-one years of age who is substantially disruptive of the educational process or substantially interferes with the teacher's authority over the classroom.