Kids in college relocate all the time to different schools. Furthermore, they frequently change their mind and decide that they want to work towards a different career or enroll in a secondary part time course to enhance their existing education. Running ads that target existing university students can get encouraging outcomes for professional, vocational, and career schools.
What sort of ads?:
- Print ads in university papers (for open house and free seminars)
- Audio ads on student run broadcast / radio stations (for open house and free seminars)
- Posters at bus stops
- Posters in the student union
- Posters in information kiosks
And not necessarily at 4-year colleges; investigate your local community colleges. Those are great places to reach new potential students who are already planning to extend their education after they complete their current enrollment.