Imagine having your teacher staying at your house for the weekend, while you do the teaching and they do the learning! Nightmare or dream come true? Teach's co-ordination is put to the test as she tries to master viola and archery, before facing an exam on Monday in front of the whole class to see if they've been paying attention! Kirsten O'Brien and Johny Pitts present the ultimate challenge for Britain's kids and their teachers.