School Food Recovery Act of 2020 This bill directs the Department of Agriculture (USDA) to provide competitive grants and technical assistance for local educational agencies to implement food waste measurement and reporting, prevention, education, and reduction projects. In awarding grants, USDA must give priority to agencies that agree to use grant funds for carrying out specific projects, including (1) experiential education activities that encourage children enrolled in such agencies to participate in food waste measurement and education; and (2) the establishment of food waste measurement, prevention, and reduction projects with long-term sustainability. The federal share of project costs may not exceed 75% of the total cost of carrying out such projects.