how do you compare education systems?

There's probably a couple of things I personally would change about it.

The tests attempt to show which countries are the most effective at teaching math, science and reading.

The tests were contentious because not everyone believed it was fair to compare very different countries.

A common pattern in the Pisa rankings is that  the most successful countries tend to be smaller.

Knowledge economy is based on service industries that require workers to be highly educated, such as IT, finance and advanced engineering.

Most successful education systems educate everyone to a particular standard, regardless of their backgrounds.

你会怎么样去比较教育系统

关于这件事，可能有几件我个人想要改变的地方。

这些测试试图表明哪些国家在数学、科学和阅读方面最为出色。

这些测试引发争议，因为并非所有人都认为将差异很大的国家相互比较是公平的。

PISA排名中一个常见模式是，最成功的国家往往规模较小。

知识经济以服务业为基础，这些服务业要求从业人员受过高等教育，比如信息技术、金融和先进工程领域。

大多数成功的教育体系都会将每个人教育到一个特定的标准，而不论他们的背景如何。

The idea of how to compare education systems in the world is contentious because not everyone believes it is fair to compare very different countries. The PISA rankings attempt to show which countries are the most effective at teaching math, science and reading. The most successful systems educate everyone to a particular standard regardless of their backgrounds. And these countries tend to be smaller. That's very interesting.