Yes: The teacher's 'make or break' rule
Teachers have been known to sabotage attempts at change; certainly it is clear that such attempts can succeed only when the teachers concerned are committed to them and, especially, when they understand, as well as accept, their underlying principles. The practice of education cannot be a mechanical, largely mindless activity: it requires constant decisions and judgements by the teacher and these he or she cannot make properly without fully appreciating and accepting the underlying rationale of any activity. (2009, p.15)
By Kelly from The Curriculum: Theory and Practice.
Well said!