Thank you for all your replies. I agree, me teaching her class feels like the best way forward as I think she genuinely doesn't realise how much better things will be if she changes her approach. Trouble is, I only get 1 day a week out of class and it's difficult/impossible to get my class covered at other times. Very small school...
she doesn't have year 2, but I changed the year group in an attempt to preserve anonymity... She hasn't been at our school long enough for us to know if she's a good teacher who's been ground down by her class and so can't see the woods for the trees, or if she has struggled for years.
In terms of other questions:
What does the teacher say about her own practice? When I talked to her about the first lesson I watched, she didn't seem able to reflect on it effectively.
Does she think she is doing well? Don't know - I haven't asked her that directly as the HT is talking about competency and I haven't wanted to muddy the water. I've kept my comments to the lesson I saw and the behaviour of the pupils I saw as that was my brief for being in there.
Has she watched other teachers in other years? Not since she joined us. We're trying to arrange cover so she can come and see me teach.
Has she lots of behaviour tricks - such as marbles in a jar and get three and the kids get a time out treat - quick sing song and all that. No I don't think she has. The HT and I have made lots of different suggestions but she either ignores them or tries them once and gives up.
Would she be willing to have herself filmed so she can watch back. We don't have the technology for that one unless it's on someone's iphone!!
How about not doing an ordinary lesson or ordinary timetabled day and instead do a fill day of active learning - art, sport, music, story time, PSHE, RE, speaking and listening for maths.
Really go off piste. I agree - I think the main problem is that she expects the children to be too passive and doesn't do anything really engaging. When we've been asked to contribute items for the school newsletter or shared displays, she hardly has anything whereas the other classes have done all sorts of things worth writing about. I've strongly urged her to think of a 1 hour lesson as 2x30 minutes or even 3x20 minutes in an attempt to get her involving the children in their learning more and so more engaged - lots of short, sharp activities. But I've seen no evidence of her doing any of that.
Or break up the class so she works with half of them and you work with half etc. That could be interesting - we could do parallel activities and then compare the work they produce.
Thank you all. I've never had to support anyone like this before - normally I just get on with teaching my class and enjoying their company. Prior to this I assumed all teachers do the sorts of things that I do to engage the children etc. I actually didn't realise there are people whose lessons are so boring!