Tami Abdollah/KPCC

Superintendent John Deasy walks through an economics classroom at Los Angeles High School during a surprise visit.

When it comes to student performance, we hear a lot about teacher evaluations and class size, but what about the classroom itself?

A study in this month's Building and Environment Journal found that classroom layout can have a significant influence on children's grades, both positively and negatively. 

Here to explain is the study's lead author, Peter Barrett, who teaches architecture at the University of Salford in England.