The TEACH Grant program awards grants to students who intend to teach, to help meet the cost of their postsecondary education. In exchange for the grant, the student must agree to serve as a full-time teacher in a high-need field in a school serving low-income students, or as a full-time teacher in a high-need field for an educational service agency serving low-income students, for at least four academic years within eight years of ceasing enrollment at the institution where the student received the grant or, in the case of a student who receives a TEACH Grant at one institution and subsequently transfers to another institution and enrolls in another TEACH Grant-eligible program, within eight years of ceasing enrollment at the other institution. The eight-year period for completing the required four years of teaching does not include periods of suspension in accordance with § 686.41. If the student does not satisfy the service obligation, the amounts of the TEACH Grants received are treated as a Direct Unsubsidized Loan and must be repaid with interest charged from the date of each TEACH Grant disbursement. A TEACH Grant that has been converted to a Direct Unsubsidized Loan can be reconverted to a grant only in accordance with § 686.43.