Fewer than 1 in 4

At Bixby High School, students have at least 19 Advanced Placement courses available, including four physics options, three art classes, and a slate of others. Those A.P. classes can boost students’ grade-point average above a 4.0 because in some districts, such as Bixby, the classes are worth five or even six points. Students also can earn college credit by scoring well on the final exam. …