The Elementary School Math Professional Development Impact Evaluation (Elementary School Math PD Evaluation) is a data collection that is part of the Professional Development Impact Program (PD Impact). Elementary School Math PD Evaluation https://ies.ed.gov/ncee/projects/evaluation/tq_mathpd.asp examines the implementation and impact of the Math Professional Development (PD) program, by means of collecting fourth-grade teachers' content knowledge, classroom practices, and their student's achievement for one academic year. Two-hundred such volunteer teachers from six local education agencies (LEAs) were recruited to be randomly assigned to either an experimental or control group. Teachers in the experimental group were given the PD intervention, whereas teachers in the control group engaged in their LEAs' and schools' standard PD regimen over the 2013-14 academic year. At the end of the experimental period, a survey was then administered to obtain teacher background information for covariate use in the impact analyses. Key statistics produced from Elementary School Math PD Evaluation include, inter alia, the implementation of the PD program and its impact on the participating teachers' students' achievement in the classroom.