A controversial overhaul of classroom teaching in Scotland will take effect as secondary pupils begin returning to school after the summer break.
The Curriculum for Excellence, which has been four years in the making, aims to give teachers more freedom and make lessons less prescriptive.
Some teachers, unions and opposition parties have expressed concern the curriculum is not ready.
But Scottish ministers have given assurances it will improve standards.
And Education Secretary Mike Russell said the current system was not being largely re-written.