[senco-forum] coursework and a statemented pupil

Advice gratefully received.Here's the scenario.
Science teacher e-mailed me today - this girl in Yr 11 has some big gaps in her coursework - applied science -  missed some experiments etc and write ups. May be too late to fill in some of the gaps as it's really all due in now. 
She has had full cover - 30 hours (don't ask how I managed that) and a TA in every lesson since year 7 - she has epilepsy and non-verbal learning difficulties ( result of hydrocephalus). Same teachers for her subjects too - no changes.
She's had the same TAs throughout - more or less.
Now - coursework is supposed to be done by the students I know but she has had loads of help with finding information, organisation etc. So how come there are gaps - well, I'll have to call the TAs together for a meeting next week. We may have to explain to her Mum how this has happened.
But I want to ask you all - should we have done more, should we have kept a fuller record of what she had and hadn't done, kept copes maybe, who is ultimately responsible - the class teacher, the TAs, me ?  What do/would you do in this situation. 
I want to make sure that if possible this won't happen again with pupils lower down the school with statements who are also difficult to support, disorganised etc but none of whom have full cover.
I'm open to all suggestions and criticisms.
Cheers
Janice Janice Wray Secondary SENCO, Herts
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