DC 1 is in Reception, fairly large school.
Had a few issues settling in but I told myself I was over reacting and see how it developed.
Today at pick up I was presented with a teary child who had a lump same size as a £2 coin right under her eye. I was told "We don't know how it happened, but put ice on it. She's been very tired today and quite whingy." I said ok then asked when it happened was told lunch time and "These things happen ! It gets so busy and manic we can't watch all the children." I just said ok again and picked up DC who wanted a cuddle.
As soon as we got to the car I asked what happened, DC has a speech delay but communicates enough in small doses. I only asked what happened and she burst into tears saying "Xx kicked me here (pointed to her shins) and hit me on my face. It really hurts." 
She's quite small for her age and quite passive and shy, after initial anger I told myself to calm down and think rationally and this stuff happens in play grounds.
However I'm a bit
at the "We can't watch all the children, it's so manic." comment. Surely they have duty of care at all times ? Playground accidents are fine but this sounds deliberate and I'm quite cross about this. I want to say something to the teacher but I'm also annoyed at them saying they don't know what happened, but I just asked her and she told me ? Did no one think to ask her in the afternoon ?
AIBU here and pfb ? Happy to be told I am, but still a bit
at "we can't watch them."