(3) High-need school .— The term “high-need school” means— (A) an elementary or middle school in which at least 50 percent of the enrolled students are children from low-income families, based on the number of children eligible for free and reduced priced lunches under the Richard B. Russell National School Lunch Act ( 42 U.S.C. 1751 et seq.), the number of children in families receiving assistance under the State program funded under part A of title IV of the Social Security Act ( 42 U.S.C. 601 et seq.), the number of children eligible to receive medical assistance under the Medicaid program, or a composite of these indicators; (B) a high school in which at least 40 percent of enrolled students are children from low-income families, which may be calculated using comparable data from feeder schools; or (C) a school that is in a local educational agency that is eligible under section 5211(b) of the Elementary and Secondary Education Act of 1965.