PHILADELPHIA — The shooting at a Texas elementary school on Tuesday was among 28 fatal shooting incidents at U.S. schools or on school grounds since 2018, resulting in the deaths of 75 people, including 60 children, according to data from Education Week and an Inquirer analysis. This includes four people killed at Pennsylvania schools — a 32-year-old man outside of Lincoln High School in Philadelphia in 2018, a 48-year-old man at Jeannette City School District in Jeannette in 2019, 8-year-old Fanta Bility outside of Academy Park High School in Sharon Hill in August, and a 15-year-old student a…