; (B) how the eligible entity will use planning grant funds in accordance with the purpose of this part, including to establish a process to prioritize and allocate resources and services to address the unmet needs of children and youth in the community; and (C) how the eligible entity will use planning grant funds to become more competitive in applying for a grant under subpart A. (e) Limitation No entity may receive a grant under this section while concurrently receiving grant funding under subpart A of this part. (f) Matching funds The Secretary shall require that each eligible entity receiving a grant under this section contribute matching funds in an amount equal to not less than 50 percent of the amount of the grant. Such matching funds may come from Federal or non-Federal sources. 8022. Evaluation From the amounts appropriated under section 8024, the Secretary may reserve not more than 3 percent for a national evaluation of the activities carried out under subpart A. In conducting such evaluations, the Secretary shall— (1) direct the Director of the Institute of Education Sciences, in consultation with the relevant program office at the Department, to evaluate the implementation and impact of the activities funded under subpart A, including the costs and benefits of such activities, relative expenditures on different activities in the pipeline, and the impacts of such activities on incarceration and recidivism rates of children in neighborhoods served by grants under such subpart; (2) direct the Director of the Institute of Education Sciences to identify best practices to improve the effectiveness of activities funded under subpart A