; and (bb) the effects of comprehensive sex education; (iv) convene national conferences on comprehensive sex education, in order to effectively train teachers in the provision of comprehensive sex education; and (v) develop and disseminate appropriate research-based materials to foster comprehensive sex education. (C) Subgrants Each eligible entity receiving a grant under this section may award subgrants to nonprofit organizations that possess a demonstrated record of providing training to faculty, school administrators, teachers, and staff on comprehensive sex education to— (i) train teachers in comprehensive sex education; (ii) support Internet or distance learning related to comprehensive sex education; (iii) promote rigorous academic standards and assessment techniques to guide and measure student performance in comprehensive sex education; (iv) encourage replication of best practices and model programs to promote comprehensive sex education; (v) develop and disseminate effective, research-based comprehensive sex education learning materials; (vi) develop academic courses on the pedagogy of sex education at institutions of higher education; or (vii) convene State-based conferences to train teachers in comprehensive sex education and to identify strategies for improvement. (e) Impact evaluation and reporting (1) Multi-year evaluation (A) In general Not later than 6 months after the date of the enactment of this Act, the Secretary shall enter into a contract with a nonprofit organization with experience in conducting impact evaluations, to conduct a multi-year evaluation on the impact of the grants under subsections (b), (c), and (d), and to report to Congress and the Secretary on the findings of such evaluation. (B) Evaluation The evaluation conducted under this subsection shall— (i) be conducted in a manner consistent with relevant, nationally recognized professional and technical evaluation standards