The extended diploma, to be available from 2011, will combine both applied learning and theoretical knowledge as well as a strengthened core of English and maths. It will be equivalent to four and a half A levels, and aimed at the most able students. Steve Sinnott, general secretary of the National Union of Teachers said the government had to be careful that "piecemeal changes" did not undermine confidence in the diplomas. And Mary Bousted, Association of Teachers and Lecturers...