This study examined differences in Texas middle school student achievement in science by school district enrollment size. Quantitative research utilized analysis of variance to determine whether significant differences existed between student achievement on the 2010 Texas Assessment of Knowledge and Skills 8th grade science results and four school…

Researchers often presume that it is better to use administrative data from grades 4 and 5 than data from grades 6 through 8 for conducting research on teacher effectiveness that uses value-added models because (1) elementary school teachers teach all subjects to their students in self-contained classrooms and (2) classrooms are more homogenous at…