The district keeps score at each traditional public and charter school with a 1-to-100 index known as the School Progress Report (SPR). It grades schools' achievement, progress, climate and - for high schools - college and career readiness.
Superintendent William Hite says overall, the scores have been inching upward.
"What we've seen for three consecutive years are public schools across the city that are improving," Hite said.
That's from an overall score of 33 in 2014-2015 to 42 last school year.
Schools are sorted into one of four tiers based on their scores and those in the bottom tier get extra resources.
Hite says attention to specific areas has led to fewer schools in the bottom tier.
"We've been working on attendance for four of those five years. Now we're seeing results. We've been working on climate for seven. Now we're seeing results. But it's that sustained focused effort," he said.
The district saw the biggest improvement at Hartranft and Mitchell elementary schools, the Middle Years Alternative and Lankenau high school. The SPR score was 42 last year for district and charters combined. Separately, the overall district SPR was 40, and charters scored 46. The district points out that seven low-performing charters were closed since 2014-15.