The Dark Green Book of Dreams: My Teacher's a Witch!

Four children are asked to write a story for a mysterious substitute teacher, but their adventures become real, taking them on an exciting journey through time from Ancient Egypt into the future. Ms Hamilton. an unusual substitute teacher, takes over a class of eleven-year olds for a week and asks for volunteers for the 'adventure of a lifetime'. She produces a strange book and asks each of the children to write a chapter. But when they open the book, instead of writing their stories, they experience them! In each exciting episode, the children must defeat Aggie, Conor's evil step-mother, who is battling to keep them trapped in their new reality.