Researchers have some interesting insights from schools in different countries based on their performance level on the PISA, an international assessment of student performance.

Here’s the key takeaway:

Generally speaking, the smartest countries tend to be those that have acted to make teaching more prestigious and selective; directed more resources to their neediest children; enrolled most children in high-quality preschools; helped schools establish cultures of constant improvement; and applied rigorous, consistent standards across all classrooms.

2015-PISA-math-test

Image courtesy of OECD

NY Times: What America can learn about smart schools in other countries

OECD: 2015 PISA test results