The Demon Headmaster: Total Control

Everyone is good at something. But at Lizzie's school this has been taken to extremes. Her classmate Ethan, who previously had no interest in sport, is now incredible at football; her brother's suddenly an expert in robotics; and Lizzie has become really good at being bad. It's as though they have no power over their own actions. Could this be something to do with the mysterious new headmaster?