October 18th, 2007
We already know that reduced class size can contribute to achievement gains, especially in disadvantaged groups such as African Americans. Now we find that reduced class size is correlated with better health as well.
Science Daily reports on a new study published in the November issue of the American Journal of Public Health by researchers at Columbia
University Mailman School of Public Health and the Virginia
Commonwealth University, reducing the number of students per classroom in primary schools
may be more cost-effective than most public health and medical
interventions.
"The researchers estimated the health and economic effects of
reducing class sizes from 22–25 students to 13–17 students in
kindergarten through grade 3 nationwide, based on an intervention
tested in Project STAR (Student Teacher Achievement Ratio), a large
multi-school randomized trial that began in 1985."
"The study shows that a student graduating from high school after
attending smaller-sized classes gains an average of 1.7
quality-adjusted life-years and generates a net 8,431 in lifetime
revenue. "Higher earnings and better job quality enhance access to
health insurance coverage, reduce exposure to hazardous work
conditions, and provide individuals and families with the necessary
resources to move out of unfavorable neighborhoods and to purchase
goods and services," says Peter A. Muennig, MD, MPH, assistant
professor of Health Policy and Management at the Mailman School.
"Regardless of class size, the net effect of graduating from high
school is roughly equivalent to taking 20 years of bad health off of
your life."
Now if we could only open up the black box and figure out why, although we
might take some educated guesses? An increased sense of connectedness,
increased emotional support, caring adults, more one-on-one teacher to
student support…what do you think?
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