Mining the Gap: Analysis of Early Mathematics Instructional Quality in Pre-Kindergarten Classrooms

Research Findings A total of 54 videotaped mathematics activity observations drawn from 27 different pre-kindergarten classrooms in an urban public schools system in the U.S. were coded using 2 observational measures: (a) a general measure, the Classroom Assessment Scoring System (CLASS); and (b) a math-specific measure, the High Impact Strategies in Early Mathematics (HIS-EM). Criterion validity analysis revealed varying levels of convergent...