Andreas Schleicher, a coordinator of PISA, the OECD's Program for International Student Assessment which compares educational achievement in different countries, said the training of teachers in particular needed to be radically revamped.

In Germany, there's an attempt by "teachers who have been trained in the 20th century to teach children of the 21st century in a school system that was conceived in the 19th century," Schleicher said.

He added that school teachers sorely needed a more hands-on training approach.

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