I have tried in the past to teach Dd3 to backward chain unsuccessfully but today while practising her trumpet it became clear that her trumpet teacher has succeeded 
So... could I teach her to say select the appropriate operation for a maths problem this way? If I for example showed her how I reach an answer and demonstrate how I reached it in small steps but backwards?
Just a thought as we are going to be HEing for a while and I am looking at alternate ways of teaching her the skills that the teachers have failed to teach her!
Thanks in advance 