John L. Costley Middle School is a Public School in with 449 students, ranking it #288 in enrollments out of 430 New Jersey Middle Schools.
The 29 teachers at John L. Costley Middle School teach grades 6 through 8 and are responsible for 15.59 students on average, receiving a B+ grade in student-teacher ratio.
Based on several factors like math and ELA proficiency, diversity, and student-teacher ratio, John L. Costley Middle School receives a rating of D+.