While politicians debate whether the Keystone Exams should be part of high school graduation requirements, the tests continue to measure students’ proficiency in three core subjects.

And Delaware County, for the record, is home to a number of schools with a large portion of students passing those tests with flying colors, according to a Philadelphia Business Journal report by Clara Lefton and Craig Ey.

Based on its students’ Keystone Exam scores, Radnor had 66.1 percent of its pupils advanced at algebra, 59.8 percent at biology, and 22.9 percent at literature.

That placed Radnor fourth among the Top 50 in Greater Philadelphia.

The numbers for Strath Haven, which ranked sixth, were 55, 58, and 29.9, respectively.

Other Delaware County schools in the region’s Top 50 were:

• 12. Haverford
• 15. Penncrest
• 29. Garnet Valley
• 35. Springfield
• 40. Marple Newtown

See more details and compare the results in the Philadelphia Business Journal here.