; or (ii) based on documentation presented to the Secretary of substantial economic or personal hardship. (f) Institutional support for fellows An eligible institution that receives a grant under this section may reserve not more than ten percent of the grant amount for academic and career transition support for graduate fellowship recipients and for meeting the institutional obligation described in subsection (e)(3)(B). (g) Restriction on use of funds An eligible institution that receives a grant under this section may not use grant funds for general operational overhead of the institution. C National Activities 251. National activities (a) In General The Secretary shall establish a Center for Educator Preparation to provide technical assistance relating to educator preparation and to support research and demonstration activities. (b) National evaluation of educator quality enhancement (1) Interim evaluation Not later than 3 years after the date of enactment of the EDUCATORS for America Act , the Secretary shall submit to Congress and make publicly available an interim report containing an evaluation of the effectiveness of the activities funded under this title in achieving the purposes of this title. (2) Final evaluation Not later than 6 years after the date of enactment of the EDUCATORS for America Act , the Secretary shall submit to Congress and make publicly available an interim report containing an evaluation of the effectiveness of the activities funded under this title in achieving the purposes of this title. D General Provisions 261. Limitations (a) Federal control prohibited Nothing in this title shall be construed to permit, allow, encourage, or authorize any Federal control over any aspect of any private, religious, or home school, whether or not a home school is treated as a private school or home school under State law. This section shall not be construed to prohibit private, religious, or home schools from participation in programs or services under this title. (b) No change in state control