All teachers need professional development throughout their careers, with continuous feedback between theory, practice, and research.

UNESCO: OFFICE IN KATHMANDU

"We are all able to speculate on the reasons for this failure and we are sure that many column inches will be written about the funding gap, inadequate continuing professional development (CPD) opportunities, leadership issues, performance management, best practice and disruptive behaviour, " he said.

BBC: Pisa tests show pupils in Wales falling behind