In two studies, we examined the effect of professional development to improve mathematics instruction on the accuracy of teachers' monitoring of student learning. Study 1 was conducted with 36 teachers participating in three years of professional development. Judgment accuracy was influenced by the fidelity with which what was learned in the professional development. Study 2 was conducted with 64 teachers from 8 schools, which were randomly assigned to receive professional development or serve as a control. Judgment accuracy was greater for teachers receiving professional development than for teachers who did not and teachers were better to predict students' computational skills.
NOTICE: this is the author’s version of a work that was accepted for publication in Teaching and Teacher Education. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Teaching and Teacher Education, Volume 49 (2015). doi: 10.1016/j.tate.2015.01.012