The board of education of any school district or the board of trustees of any community junior college, which school district or community junior college is: (a) Participating in or cooperating in any vocational education course or program; (b) engaged in field trips in connection with any course or training; or (c) engaged in any extracurricular school activity, may provide and furnish transportation for students and school personnel of the school district or community junior college. The school district or community junior college may pay mileage for those school buses contracted, leased or hired for such purposes, and may adopt rules and regulations governing the use and operation of such school buses. All students so transported shall be under school control and discipline and in every case shall be accompanied by a suitable adult person.