Thanks Val! And no worries about response time, is hard to keep up with it all sometmes.

MM seems to be about capturing their interest with math by showing all the cool things you can do with it. It is not a textbook but has problems to do. So it might have a similar problem but presented in a weirder way. It seems to have covered a lot of stuff in terms of theory and little in terms of math facts, which is why DS loves it. I hadn't been sure where to go next. We just got him the usbourne dictionary of chemistry ColinsMum recommended and they have a math dictionary which DS wants and I poo pooed thinking it was too hard, which of course got his back up, I do so know my math facts! So I was looking for presentation of the same stuff but in a fun non textbook way So sounds like it might be a good way to go.

DeHe