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.

Chester 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 their students’ Keystone Exam grades in algebra, biology, and literature, the Downingtown STEM Academy had the second-highest percentage of advanced-level students in all of Greater Philadelphia, while Conestoga came in third and Unionville took fifth.

Downingtown STEM had 64 percent of students at advanced algebra, 97.2 percent at biology and 36.5 percent at literature. The numbers for Conestoga were 61.6, 66.4, and 24.8, respectively, while Unionville boasted 64.5, 59.3, and 24.6, respectively.

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

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• 11. Great Valley
• 19. West Chester Rustin
• 23. West Chester East
• 26. Owen J. Roberts
• 28. West Chester Henderson
• 33. Kennett
• 36. Avon Grove
• 44. Downingtown West
• 45. Phoenixville
• 50. Downingtown East

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