Slightly different to most of the people here:
When I was in year 1 there was a girl who briefly went to our school. I remember her being called Sarah. I went to her house once, there was just her and her mum.
It was a real old house, I don't think there was electricity, and I also think they had to pull water from the well. It was built between standard Mill terrace houses, not sure why it had been left.
I remember wondering in what they called the garden, which was an overgrown bluebell wood, picking flowers with her, and her mum asking for us to fetch some water.
She moved away fairly shortly after that, I think with no warning, and the house was demolished for the village bypass. Looking back, I suspect they were squatting, may have been travellers perhaps.
Other one is quite sad. I used to nanny a little boy for a friend. She used to take the train through, I'd cycle to the station, collect him as she passed through on the way to work, then pop him back on the train when she returned and cycle home again.
One time I was running late and I was running with the buggy, and as I passed this lady I realised that she was crying badly. I ran into the station handed him over to his mum, and was back out again in about 5 minutes. But although I cycled round and round I couldn't find her again. I've always felt bad that I didn't stop, because his mum would have totally understood, but she'd then have had an hour wait for the next train and I didn't really think in time. 
And a girl in the next village. I didn't really know her, but she was one of the only children in my year who went to the Sunday School and then she'd joined the choir, so we just waved at each other. We were both shy so we never talked much.
She was killed in her first year at secondary running off the school bus. She was going to meet her little brother for the first time and she was so excited. 