Years before Jamie Oliver tried the same trick, BBC Radio Scotland had a format in which famous folk were invited to teach a lesson in a Scottish school. The series was called Class Act and included names such as theatre impresario Cameron Mackintosh, Chef Brian Turner and newsreader Dermot Murnaghan. My favourite edition featured the comedy actor, Karen Dunbar who talked to pupils about her childhood dream of being on television or in movies. She also described her own anxiety and confidence issues and illustrated it with this tale of going for an audition, almost bottling out and then asking herself some key questions.