There are two great online Maths programs:
IXL is the one, and I got really excited when I found it. BUT this next one is one that gets us all excited about Maths (Even DS2 loves to watch Aiden "playing Maths").
www.mathletics.com it is very interactive, full of funny sounds and images, and is lovely for kids learning maths and having fun. PLUS you can change the curriculum as you move through it. AND there is live online maths against kids from all over the world for mental maths practice.
We do quite a bit of extra stuff in the afternoons when Aiden gets home (he is now 4) from pre school but I try and do more active things - we do science, we garden, we go for walks to find things, we do hands on geography etc. He responds a lot better to these, although I must say that we get phases where he just wants to sit and do book work too, although I try keep that for when he wakes at 5:30am on a saturday rather! haha
