A report from the state education department says Michigan's charter schools appear more likely than traditional public schools to struggle under federal No Child Left Behind standards.
About 16 percent of public elementary and middle schools statewide face sanctions under No Child Left Behind. About 34 percent of charter schools face sanctions.
The most common sanction is allowing students to transfer to better-performing schools.
But there also are positive signs for charter schools in the report. Many were able to avoid worse sanctions by improving their MEAP scores last year.
Michigan has about 200 charter schools with about 75,000 students.
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