I was alerted to the following tweet by @thingsbehindsun
The slide in question by Andy Buck suggests that Canada and Finland “keep improving” while the U.K. and the U.S. “don’t improve much”:
Let’s have a look at the PISA data for Canada and Finland:
If we look at the U.K. and the U.S., things seem pretty static apart from a fairly obvious decline in U.S. maths performance which is, no doubt, related to the increasing influence of constructivist maths approaches:
These graphs also hide an important amount of regional variation. Canada, the U.K. and the U.S. all have multiple education systems. For instance, the comments in the slide would better describe the approach in England than Scotland, and Scotland’s results are in decline.