Does my teaching service count towards student loan reimbursement?

It reads 5 consecutive years teaching Math, Science or Special Education to get up to $17,500 student loan reimbursement. I have taught for three years. 1st year was middle school math. The second year, I moved to a different school but it was not until semester, so I started in January 2010 but still received full year teacher service credit from my district, taught special ed. Last year I was at the same school the whole year. Will this count as 3 consecutive years or does that 2nd year wipe it out since it was not for the whole year?