; and (B) evidence-based models for structuring the timing of tutoring sessions, including— (i) how to create, in addition to regular classes, a tutoring class; (ii) how to allocate, at the discretion of the teacher, time during regular classes during which students may receive tutoring; and (iii) how to identify an optimal time during the school day for tutoring outside of regular classes. (8) Develop, in coordination with the Secretary and the State educational agencies receiving a grant under this Act, a nationwide tutoring workforce in accordance with section 7. 6. Subgrant uses (a) In general (1) Implementation A local educational agency receiving a subgrant under section 4 shall use such subgrant funds to implement tutoring programs that meet the requirements described in subsection (b) in each elementary and secondary school served by such State educational agency. (2) Nonprofit provider A local educational agency shall have the option of partnering with a nonprofit provider, including an institution of higher education or other government agency, to implement tutoring programs that meet the requirements described in subsection (b), after certifying to the State educational agency that the nonprofit provider has experience and expertise in implementing high-quality tutoring programs. Local educational agencies will be required to develop a long-term plan to operate tutoring programs without a nonprofit provider and taught by licensed elementary or secondary school teachers or paraprofessionals, with an exemption available if the local educational agency certifies and the State educational agency approves that it is unable to run such a program without a nonprofit due to labor shortages. (b) Program requirements (1) Instruction A program carried out by a local educational agency pursuant to subsection (a) shall provide tutoring— (A) in math, reading, or both subjects for at least 30 minutes during the school day and for at least 3 days per week during the school year