A proven incentive to jump-starting a college career, high school students taking dual college credit classes will continue at Montana State University Billings next year at no cost.  The fee waiver, which excused students from over $51 per-credit fees, coincided with a spike in interest in dual credit classes, which are college-level courses taught in high schools by high school teachers with advanced certifications.  Credit-hours taken by students overseen by MSUB and City College have more than tripled this year.