It is understood the teacher, Mrs Ann Maguire, as stated on the school website, taught Spanish and RE and was the head of year 11 at Corpus Christi Catholic College in Leeds.
A 15-year-old boy has been arrested in connection with her death.
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Opera singer Lizzie Jones is special guest at Mytholmroyd Gala.
Council, police and faith leaders attended Leeds Makkah mosque prayers to demonstrate their support.
A crackdown on gang crime in an area of Sheffield has resulted in the seizure of a number of knives, baseball bats and Class A drugs.