„Low achievers and students from disadvantaged backgrounds feel less supported than their schoolmates in education systems that teach students in comprehensive schools, while no such within-school disparities were observed in tracked education systems.“
Dr. Svenja Vieluf u. a., „Who has a good relationship with the teachers? A comparison of comprehensive education systems with education systems using between-school tracking“ in „Oxford Review of Education“ (2015), Vol. 41, No. 1, S. 20