From the hardscrabble hills of western Pennsylvania to the hardknock blocks of Northeast Philadelphia, children are getting inferior educations in underfunded school districts with low property values and incomes. Crowded classrooms in the state’s 100 most poorly funded districts deny children, who may enter kindergarten a year behind their more affluent peers, the attention they need. Those districts, including South Allegheny, East Allegheny, New Castle, Sharon and Philadelphia, educate one-third of the state’s 1.5 million students, two-thirds of its Black students, and nearly 60% of its poor students. Leaky roofs, obsolete and unsafe buildings, and broken laptops plague many of...