My daughters school has recently started afterschool clubs. They run from 3.15-4. I had not signed her up for any.
Today i went to collect her from her classroom, (she is 5 and in year 1 so we need to collect them from the door) and she was not there. I asked her teacher where she was and was told that he 'didnt know'. 
2 other parents were also looking for their children who were also 'missing'.
The teacher informed me that another teacher had taken a few children off to the after school club, and that our children were probably there. He didnt have a list of children who were meant to be in the club but said that if we went to the computer room we could see if they had gone.
When we arrived at the computer room there were 10 year one children (including the 3 'missing) in there doing cartwheels and handstands and hiding under tables, with no teachers in sight.
When we asked them where the teachers were they didnt know.
I went to find a member of staff to find out what was going on. 2 teachers came with me back to the classroom and began to berate the children as to why they were in there. "Why have you come to this club? I asked who was in this club, you are not, why have you come to the computer room?"
Apparently she had said to the children before they left class- "Whos coming to afterschool club? Please go and wait in the computer room" , my daughter and the other 2 'missing' children had thought it sounded fun so had gone also.
AIBU to expect that they take pupils from a list that they know are meant to be attending the club, rather than to expect children of 5 to know what theyre meant to be doing?
AIBU to expect her class teacher to know where she is when i go to collect her?
AIBU also to expect that they dont leave children of such a young age unsupervised for an extended period of time in a room full of expensive equipment, at a time when the school is wide open and people are coming and going?