Most pupils know not to use their mobile phone during lessons or run in the corridor. Children at Michaela Community School also know that they must follow the teacher with their eyes - or face detention.
The pupils at the uber-strict school, which has been dubbed a North Korean-like "cult" by some, have faced detention for mistakes such as forgetting a second pencil, making a silly face in the corridor between lessons or not making enough eye contact. The high-achieving school is ran by Katharine Birbalsingh, 49, who has been dubbed Britain's toughest head teacher.
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