DD1 (4.10) is in Reception. She's always been single-minded about doing what she wants to do, chooses to be quiet (rather than shy) and stand back to suss out a situation/activity before she acts and can fly off the handle very quickly if frustrated. She's oldest of my 3 DC and can be bossy or 'big sisterly' as her teacher put it, and quite surly at times. Her teacher hasn't mentioned any unwanted behaviour, but if she acts at school they way she sometimes is with her younger brother, I can imagine she'll find it difficult to make/sustain friendships.
She seems to have settled in quite well at school but apparently has trouble understanding that you can be friends with someone but not necessarily play with them every day, and hence, you are still friends with them if they play with someone else sometimes.
Anyway, today she said she went off to another room to 'make a friendly group' with a teacher (actually a children's centre worker) and 3 other children who I know have had trouble with their behaviour. School didn't mention anything and it was the last day of term.
What should I make of this? And how can I help her to be friendly and kind to other children?