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Middle School Mathematics Professional Development Impact Study Findings After the Second Year of Implementation

NCEE 2011-4024
May 2011


Figure ES-2. Impact of the PD Program on Student Mathematics Achievement at the End of the Second Year
 
Figure ES-2. Impact of the PD Program on Student Mathematics Achievement at the End of the Second Year

SOURCE: Spring 2009 NWEA Rational Number Test.
NOTES: The impact analyses for student mathematics achievement were conducted using scale scores. Although the theoretical scale scores for the student achievement test range in value from negative infinity to positive infinity, typical scores fall between 150 and 300 (NWEA 2003).
The estimated impacts are based on a three-level model controlling for random assignment block and student-level covariates.
The figure displays regression-adjusted mean outcomes for each group, using the mean covariate values for students in the treatment group as the basis for the adjustment.
P-values are based on t-tests. Two-tailed statistical significance at the p ≤ .05 level is indicated by an asterisk (*).