We are getting a clearer sense that certain mathematically rigorous content is relevant
to teaching. Proving it is another matter. Establishing empirical evidence for a claim
about the effects of teacher knowledge requires the consideration of multiple studies
and varied perspectives. Its synthesis also requires a healthy dose of practical judgment.
A concerted effort to find evidence for the effects of teacher knowledge on student
achievement extends back to at least Begle (1979). This research found that most
of the studies conducted during the middle of the 20thcentury showed negligible
effects of the mathematical preparation of teachers on student achievement. Nearly
as many reported small negative effects on student achievement as reported
small positive effects. This was discouraging news, but led many to think
that the problem was how the mathematical knowledge of teachers was being
measured. Does choice of major influence student achievemen? The number
of college mathematics courses taken? One’s score on a standardized test?
The problem was more than one of proxies for measuring mathematical
knowledge. Inadequate measures, concepts, models, and methods have limited
researchers’ ability to determine whether, and to what degree, improving the
mathematical knowledge of teachers improves student achievement. Studies
by economists and researchers of teaching, plus data from international
achievement studies, suggest, in different ways, the importance of
understanding how teacher knowledge effects student achievement.
We are getting a clearer sense that certain mathematically rigorous content is relevantto teaching. Proving it is another matter. Establishing empirical evidence for a claimabout the effects of teacher knowledge requires the consideration of multiple studiesand varied perspectives. Its synthesis also requires a healthy dose of practical judgment.A concerted effort to find evidence for the effects of teacher knowledge on studentachievement extends back to at least Begle (1979). This research found that mostof the studies conducted during the middle of the 20thcentury showed negligibleeffects of the mathematical preparation of teachers on student achievement. Nearlyas many reported small negative effects on student achievement as reportedsmall positive effects. This was discouraging news, but led many to thinkthat the problem was how the mathematical knowledge of teachers was beingmeasured. Does choice of major influence student achievemen? The numberof college mathematics courses taken? One’s score on a standardized test?The problem was more than one of proxies for measuring mathematicalknowledge. Inadequate measures, concepts, models, and methods have limitedresearchers’ ability to determine whether, and to what degree, improving themathematical knowledge of teachers improves student achievement. Studiesby economists and researchers of teaching, plus data from internationalachievement studies, suggest, in different ways, the importance ofunderstanding how teacher knowledge effects student achievement.
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