I'm not sure teachers are the best people to deal with the problem, they are known to the kids and see them regularly, but lack one to one time.
Me too teachers don't always have the time, there is literally no other trustworthy adult available for these DC.
I know a family who are under the radar. I have reported incidents myself, a blind person could see those DC are neglected and the older DD is regularly physically hurt. The school have reported concerns, other neighbours have reported concerns - the DD was removed from the home for a few months, she is back, lots of shouting again from the mother when she hasn't left her minding the younger siblings and gone off to score crack.
I reported as I saw the mother roaring into her DD face, her DD was frozen in fear - the mother is wild.
Social worker . Do you know why they were arguing?
Me . It wasn't an argument the mother is spitting shouting.
Social worker . Do you know what the DD done wrong.
Me . I don't think anything warranted her DM acting like that.
Social worker. Okay we'll investigate, they didn't take any further action only a phone call.
My report was probably the 20th from neighbours.
Their original investigation found no evidence of abuse or drug use despite neighbours, teachers, carers confirming DM is a crack addict.
I told the DD next time run to my house, I'll keep her here.