Education Secretary Nicky Morgan has announced Amanda Spielman is set to take over as chief inspector of schools in England. But the decision has provoked some controversy. Teaching unions have pointed out that Amanda Spielman has never been a teacher herself. But others have defended her, saying her experience setting up a successful academies chain - and most recently at exams regulator Ofqual - mean she's well-placed to take on this important role. Mark Coles has been finding out what makes Amanda Spielman tick.