There are many great resources out there for teachers to access in regard to safe communication online.
‘Making good choices online’ is a resource created by the e-safety commissioner (Australia gov). It is created for upper primary school students and gets them to start thinking about the choices they make online and how it affects themselves and others. It is a powerpoint presentation and it explores three different scenarios asking students to place themselves in the shoes of Tom’s character and decide what he should do in each online situation. Get students to split into groups to discuss and then share their answers with the class.