For instance do they begin with 2 and work through them to 3 4 5 6 in this order or do they teach them in order of which are easier to learn for instance 2 5 10 etc if that makes sense at all.
I just wondered in which order to support dd, she brought home the mental test for 2 on Monday and had lots of gaps after practicing she seems to have cracked it and so I didn't know what to move on to next to help prep her for the next lot.