A tutor brought in to improve pupils’ behaviour was filmed feeding a wild rat near the school kitchens.
Paul Ashworth, a member of staff at Springwell Community College in Chesterfield, is being investigated.
Pest control experts were also called in.
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The man was found 160 metres away from his car, unresponsive and suffering from hypothermia.
Conservative Ben Bradley admitted his claims were 'wholly untrue and false', and pledged a 'significant' donation to charity.
Weather outlook: Temperatures below average during the day and overnight. Up to 10 centimetres of snow expected on Monday in some parts.