In this technical report, data are presented on the practical utility, reliability, and validity of the easyCBM[R] mathematics (2009-2010 version) measures for students in grades 3-8 within four districts in two states. Analyses include: minimum acceptable within-year growth; minimum acceptable year-end benchmark performance; internal and split-half reliabilities; reliability of the slope estimates; construct, concurrent, and predictive validity; and predictive validity of the slope estimates. Results demonstrate the technical adequacy of easyCBM[R] mathematics measures and add to the research on the technical properties of curriculum-based measurement (CBM). (Contains 1 footnote.)