[youtube https://www.youtube.com/watch?v=Ugz_1Clpsdk?version=3&hl=en_US&rel=0&w=460&h=300%5D

In New Zealand it seems we are constantly being reminded of our rankings in the international PISA results, particularly where disadvantaged groups of students are concerned. While the figures and comparisons get bandied around a lot, what's interesting is to understand how they are arrived at, what goes into collecting and representing the data that is shared.

The OECD have just shared the video above in an effort to help us understand why the OECD’s number-crunchers trigger such intense debate about the state of education around the world every time they release the results of the latest PISA survey. Worth a view if you've got a spare 12 minutes and a cup of coffee.