John Jerrim.

When the PISA results are released every three years it is now little surprise when a set of east Asian nations (e.g. Singapore, Taiwan, Japan, South Korea) dominate the top spots in the rankings.

These nations typically substantially outperform most English-speaking western nations, with one important exception – Canada.

This is illustrated by the table below, which shows the top 20 countries in terms of average scores in reading, science and mathematics.