Are their certain times a grant may have to be repaid?
Yes, sometimes if you withdraw from school before finishing an enrollment period or if you receive a TEACH Grant and do not complete your obligation then you may have to pay a grant back.
What will happen if I do not fulfill my service obligations under a TEACH Grant?
Your TEACH Grant servicer will notify you if your grants are converted to Direct Unsubsidized Loans and you must then repay the loans to ED with interest added on from the date your TEACH Grant was disbursed.