How good is your New Jersey school? It’s not an easy question to answer, but new School Performance Report data released by the state Department of Education Wednesday gives parents and teachers a look at how their schools compare to others. The state released an update to its school rating system, providing scores for most of New Jersey’s schools using data from the 2022-2023 school year. The ratings are calculated using standardized test scores, student academic growth, graduation rates and other factors, including chronic absenteeism. Each school is given a score from 0 to 100, called a “su…