Is there a threshold effect in reducing class size?

There is a common misconception that a particular threshold must be reached in reducing class size — that is, a class has to be decreased below a certain number of students to have a positive effect on student achievement.

Download here, or read below to find out why this is a myth:

[gview file=”https://3zn338.a2cdn1.secureserver.net/wp-content/uploads/2018/11/threshold-effect-myth.doc”]