When compared to both their peers internationally and fellow American
college graduates, U.S. teachers have middling math and literacy skills,
finds a group of international researchers. They conclude that boosting salaries would be one way to attract higher-skilled individuals into teaching. The report asserts "differences in
teacher cognitive skills are a significant determinant of international
differences in student performance."
Hanushek, E., Piopiunik, M., & Widerhold, S. (2014). The value of smarter teachers: International evidence on teacher cognitive skills and student performance. Cambridge, MA: National Bureau of Economic Research.
http://hanushek.stanford.edu/sites/default/files/publications/Hanushek%2BPiopiunik%2BWiederhold%202014%20NBER%20w20727_0.pdf
Hanushek, E., Piopiunik, M., & Widerhold, S. (2014). The value of smarter teachers: International evidence on teacher cognitive skills and student performance. Cambridge, MA: National Bureau of Economic Research.
http://hanushek.stanford.edu/sites/default/files/publications/Hanushek%2BPiopiunik%2BWiederhold%202014%20NBER%20w20727_0.pdf