As though teachers in the global South didn't have enough problems, PISA, one of the many irritations of life for teachers in the OECD (organisation of rich nations) is being rolled out to them. For readers in the global South who have yet to be introduced to the delights of PISA, its country league tables give corporate education 'reformers' the pretext for advocating their often lucrative reforms, and panic governments into yet more badly thought out initiatives, which make the work of teachers even more difficult and stressful.

You would have thought that teachers' lives in the global South were stressful enough without this being added. Most exist on poverty pay, with class sizes often over 100, with few or no teaching materials, often in schools with no sanitation. Moreover secondary school completion rates (and the PISA test happens at 15) in sub-Saharan Africa for example vary between 1% and 37%.

According to its website, 't' aims to 'analyse the factors concerned with student learning outcomes.' This seems hardly necessary, given that it's blindingly obvious that 'outcomes' would improve with sufficient funding so that all children could access secondary (or even primary) education and be taught by properly qualified and paid teachers, in well-resourced schools. They might also improve if the vast majority of children in the global South were not living in poverty.

Never mind all that.  (always earning) has won the PISA contract - yet another opportunity to inflate its spreading bottom line. With rocky times in its main market, the US, it's important for the company to dig deeper into whatever troughs of funding it can find in the global South. And it's not alone, other companies like are getting onto the PISA act. As one breathlessly put it: 'the most radical developments in education will be in the developing world' – in particular 'relying less on teachers' and much more on technology.

So watch out teachers in the global South. There will now be even less money for education as more is poured into buying not only the PISA testing materials (yes they cost , in fact they are twice as expensive as the regular PISA tests) but also all the corporate add ons. And in exchange for this, when you find yourselves, as you inevitably will, somewhere near the bottom of the league tables – guess whose fault it will be?