A topic of debate among public education researchers and policy makers is the degree to which reducing class size impacts students’ ability to learn. Some argue that it is a leading factor, while others contend that it makes only slight difference and doesn’t justify the enormous expense. This brief, the second Utah Foundation brief covering Utah public education issues, highlights the strengths and weaknesses of efforts made to reduce class sizes throughout the country. Also, it considers the feasibility and consequences of reducing class sizes in Utah.