'You boy, the one with the chronic health conditions, you'll not amount to anything'
'Hey you, the one who stayed home after catching norovirus and chickenpox at school - do better. Be like Harry - he had the resilience to come in every day - even when on occasion that meant spending his time between the toilet and making his friends ill'
'As for you, the kid awaiting mental health support, pull yourself together. At least try to mask your feelings and behaviour until you can take no more (wait until you go to a different school though).
'Special educational needs you say? Pah!'
'Your mum died? I'm sure you can honour her by missing her funeral and aiming for full attendance instead.'
I tried to post a screenshot instead, but it wouldn't appear in message.