As you may be aware some of your children play on a game/app called ROBLOX. This allows your children to have friends and communicate with other people. I have spoken to the class and explained that they should not accept people they do not know as friends or communicate with them. They have assured me they do not and that their adults are aware they play the game. If you require more information on E-Saftey this website is great.
Thanks, Mr Barker.