Evidence for School Uniform Policies in US Seen as Weak (1/2)

双击或划选（点我安装在线划词），即可查看单词的详细解释，

并收录生词进 生词本
 

In 1999, 12% of public elementary schools in the United States required students to wear uniforms. Just 3 years later, estimates were almost double that.

Some middle and high schools have also joined the movement. Yet studies find mixed results from requiring uniforms. And some schools have turned away from such policies. Supporters believe dressing the same creates a better learning environment and safer schools. The school district in Long Beach, California, was the first in the country to require uniforms in all elementary and middle schools.

That was in 1994. The example helped build national interest in uniforms as a way to deal with school violence and improve learning.

Findings in Long Beach suggested that the policy resulted in fewer behavior problems and better attendance. But researcher Viktoria Stamison has looked at those findings. She says they were based only on opinions about the effects of uniforms. She says other steps taken at the same time to improve schools in Long Beach and statewide could have influenced the findings. The district increased punishments for misbehavior. And California passed a law to reduce class sizes.