DAR ES SALAAM, July 15 -- For years, Tanzania has invested heavily in expanding access to education, building classrooms, recruiting teachers and increasing school enrolment.

Yet education experts argue that the true measure of a successful education system is not only how many children sit in classrooms, but whether they feel safe enough to learn, speak, participate and fulfil their potential.

That reality has emerged as one of the strongest messages from the latest safe to learn national diagnostic exercise, which shows that although Tanzania has made significant progress in reducing violence against children, many schools continue to struggle with translating national child protection policies into everyday practice.

The assessment ...