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? Twins Millie and Ellie teach their teacher all about their hobbies. Teacher's challenge is to learn about figure skating and poi - before facing an exam on Monday in front of the whole class to see if she's been paying attention! Kirsten O'Brien and Johny Pitts present the ultimate challenge for Britains's kids and their teachers.