A new test from the Organisation for Economic Co-operation and Development (OECD) will let individual schools see how their achievement ranks compared to schools in other countries around the world. The goal, say the creators, is to spur school improvement.

According to a recent report released by the nonprofit educational organization America Achieves, it’s not just low-income schools in the U.S. that have poor performance—it’s the country’s middle-class students, too.

“While the need for educational improvement in low-income communities is real and important, this new report suggests that the need also extends deeply into America’s middle class,” the organization maintains.

(Next page: Good news for some U.S. schools)