Head teachers have been urged to back an overhaul of the school curriculum by Education Secretary Mike Russell.
The Curriculum for Excellence (CfE) is to be implemented in secondary schools across Scotland in August.
But there have been union threats of disruption over the controversial, planned changes.
The changes, already in place in primary schools, are designed to give teachers more freedom and make lessons less prescriptive.
Mr Russell said: “Head teachers are at the heart of any successful school.