Everyone has seen a teacher in action. Superficially it appears straight forward, the delivery of a certain body of knowledge or developing the students' skills. But every teacher is different with different teaching styles and methods. The skill comes from adaption of your methods to suit the particular group or even individual students within it. The skill comes from keeping a clear objective in mind and shepherding a group of contrasting and disparate young people towards it. The skill comes from a continuous evaluation of everything you do all of the time to ensure students are learning effectively, are engaged and motivated and, hopefully, working with you. As OFSTED has conceded by abolishing individual ratings of lessons these are skills that simply cannot be measured and evaluated. Unless you've taught for a meaningful amount of time you'd have no idea these skills actually exist. Well that's my view. What do colleagues think?