In spite of the fact that much of the achievement gap appears to be a result of differences in socio economic levels and ethnicity of students, the evidence is in that good teachers do make a difference. A study by Harvard and Columbia professors reported in The Economist (Oct. 12, 2013) finds that “good teachers are worth their weight in gold.” Students who had good teachers earn more money in their lifetime and may be better prepared for retirement.
The professors used an allegedly “bias free” quality assessment of teachers against pupils’ achievements as adults. After controlling for students previous test scores and demographics they found that exposure to better teachers:
increases student probability of attending college
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results in higher earnings as adults
reduced odds of teen pregnancy (who would have thought!)
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increased participation in retirement savings plans