The problem with class size, as a singular factor, is the research. Class size and its effect on students have been researched repeatedly. Smith and Glassï¿½s meta-analysis (1980) gives evidence that class size effects vary with students' age. And others studies indicate that class size effects vary with subject matterï¿½even within a discipline (McConnell & Sosin, 1984; Raimondo et al., 1990). Still others have indicated that class size has an isignificant impact on student success, if compared with other factors (levelling, academic supports, the presence of an aide, etc.).
In a troubled school with many troublesome factors, if all is done to "improve student success" is shrink the classroom, the outcome is negligible.