Slightly different slant on my problem. I have a just 9 year old son, skipped one year, who USED to be exceptional in maths; does better with ed psych assessments (eg. had achievement level of 9.5 at 6; 13 at age 7.4); now drifting back down to grade level.
My last post was asking about the use of in class distance ed learning and I have had a look at ALEKS, thanks for that. I am waiting for a response from the school.

My question is a more general one. Can anyone point me to a link describing HOW to teach maths to kids with a high ability?

The approach we take with ND kids is a linear one; one digit addition, then two digit etc. I have in my mind a two pronged attack; firstly a fun exploration of new and challenging concepts from high school moving at a fast pace, backed up by reinforcement of calculation etc skills a few grades below. So for example, you don't have to have all your times tables off perfectly before learning multiplying fractions.
Does anyone know of any work on this subject?

Thanks again,