Both brick-and-mortar charters and online institutions called "cyber charters" came up short in comparisons with traditional public schools.
As the Philadelphia Inquirer reports:
The percentage of Pennsylvania charter schools that met academic benchmarks plummeted after the state Department of Education was forced to recalculate the performance rates.
Under a new and controversial method the department used last fall, 49 percent of 156 charter schools met benchmarks based on student tests scores in 2011-12.
The rate dropped to 28 percent after the department released a recalculation this week. In Philadelphia, the percentage of the 80 charter schools that met the standards declined from 54 percent to 29 percent.