If you do have safeguarding concerns remember that the local safeguarding systems are still in place and you can always call the Access and Response Team 01454 866000.
Please find below some links we shared previously on keeping safe online.
This is more child based. At the bottom in the more to explore section there are individual sections for different age groups. In the 11-13 age section there are suggested resources for that age children, articles, IT expert Q&As on different topics, guides for safely setting up different apps etc. It looks like a very good overview that provides parents with further links if you want to dig deeper.
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Please click on the documents below to view –