Hanushek, Eric Alan; Piopiunik, Marc; Wiederhold, Simon - 2014 - Preliminary version
Student performance differs greatly across countries, but little is known about the role of teacher quality in … teacher skills in numeracy and literacy, providing country-level measures of teacher subject knowledge. Our student …-standard-deviation increase in subject-specific teacher skills raises student performance by 7 percent of a standard deviation in math and 6 …