Evington Valley Primary School informed mums, dads and carers on Monday that Squid Game, which was released on the streaming platform last month, is “not age appropriate” for any of the children at the school.
The letter asks parents for “support” after youngsters were seen acting out games from the “graphic” and “violent” programme, and exhibiting “aggressive behaviours”.
The letter stated: “It has come to our attention that a number of children in school have been watching a Netflix television programme called Squid Game.
“Some children have told us that they have viewed the programme alone and some have informed us that they have watched the programme with adults in the home.
“Children watching the series are being exposed to graphic, realistic scenes of violence and other material which is entirely inappropriate for this age group.”
The letter, which is addressed from Mr A. Manning, the deputy headteacher, stated the school was “concerned” that there had been occasions when children had been giving out money as a “consequence” of a game “influenced” by the programme. Children are barred from taking cash into school.
The school said it would be monitoring the situation, and would contact parents as and when staff became aware of youngsters having watched the show.
The letter stated: “Please be aware of the dangers of this TV programme for your children, and support us in keeping your children safe.
“Can I also please remind you that it is against school rules for children to bring money into school so we would ask that parents monitor to ensure no money is brought in.”
The series, which has become one of the streaming service’s most successful shows, was released on September 17, and is Netflix’s most-watched series launch ever, beating period drama Bridgerton, which was watched by 82m households in its first 28 days.
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