Thanks for your replies - and I love that article too.
DD doesn't need to use her fingers, but she isn't fast and will shut down as soon as she thinks she's taken to long (it's taken a fair few moments of my own frustration to come to realise I just need to give her the space to process a question). So I will definitely ask about that. It's interesting, there was another thread on here where the poster was wondering if their child's maths skills were regressing and it reminded me of what dd still does - often if she's not required to think about a problem in the context of 'maths' she can come up with the correct answer spontaneously.
Anyway, I'll do some more investigating.
Thanks again
