Every now and then you’ll read that Australia has done well/badly/averagely in the “PISA tests” - and there’s often an assumption about what that means (Variously: schools are doing well/badly/averagely; teachers need more help/money/inspiration; learners can/can’t read/write enough etc etc).

So I like this YouTube video produced by the team who created the PISA tests - and in very simple language sets out the answer to your question of “What are the PISA tests?”. So I’m not going to tell you anything more about them - just hit play: