Question

Sociologist jeannie oakes studied a wide range of school systems and came to the conclusion that __________ has/have the greatest effect on quality of education.

Answer 1

I believe the answer is: Tracking

Tracking in this context refers to the process of separating students based on their talent and capability.
One positive aspect of This process is that it would make the students able to focus on things that they could excel at, and the negative aspect is it could make the students feel secluded because of the feeling of unworthy of taking a certain class.