DD1 and DS1 are in year 12. They both turn 18 in November.
DS is very quiet, had a hard time with bullying and such throughout secondary education and as a result made quite close relationships with some of his excellent teachers who helped him through it all over the 5 years. He got the emails of those particular teachers to keep in contact with at the end of Y11, a year ago and they told him that when he turns 18 he can add them on Facebook/Instagram to make it easier to keep in touch. DD on the other hand was in the 'popular' group in secondary, stayed at their school sixth form, whereas DS is at another one now, and only got on with a couple of her teachers as her friendship group was a bit of a loud, bossy nightmare for most teachers.
Here is where it gets messy: in a few months they will be adults and DS is set on adding those teachers (who he still emails regularly about his courses etc) on Instagram. What I want to know is if that is allowed as I read somewhere that teachers can't have former pupils on social media until 5 years after they leave school have gone by. Well it has only been 1 for DS.
DD is at the same school for sixth form but does different subjects DD is at the same school for sixth form but does different subjects to the ones of the two teachers who teach the lower school who's emails she has and stays in contact with as she hardly sees them in school.
DD has found out about DS and when she is 18 she wants to add these teachers too. AIBU to tell her that it's inappropriate as she is still at their school and still will be in Y13 when she is 18. But I am not too sure about the laws/formalities for DS as it is slightly different for him.
Any advice?