„Teachers come from the upper part of the college skill distribution in some countries (e.g., Finland, Singapore, Ireland, and Chile) and from the lower part in others (e.g., Austria, Denmark, the Slovak Republic, and Poland).“
Univ.-Prof. Dr. Eric Hanushek u. a., „The Value of Smarter Teachers: International Evidence on Teacher Cognitive Skills and Student Performance“ (2018), S. 11