This research aims to examine the effect of birth month on student achievement as well as social and spiritual development in the classroom. We designed this research as a mixed embedded experimental design, one of the mixed research designs. For the experimental group, first-grade students in a primary school in Aziziye District of Erzurum…

A theoretical model of the relationship between class size and achievement is proposed, based on the assumption that a teacher adjusts the style and pace of a lesson to the least able student. The model accounts for features of the Glass and Smith meta-analysis of research. (Author/MT)

Effects of student grouping on academic achievement were examined in research among high school students in Israeli kibbutz schools, and in a nationwide sample of middle school students in Israel. Data analysis was based on a model developed from research findings in the United States, Sweden, Great Britain, and Israel. The treatment variable was…