I have a son who is shortly doing grade 4 cello. He is very keen and has got this far in just over a year, so I'm guessing he's got approx 2 years (maybe less) before he 'needs' grade 5 theory. He has done theory to grade 1 standard. How do people learn theory beyond this - is it something you can teach yourself (perhaps with advice from a teacher if there's something you don't understand)? What books would people recommend, or is just working through old papers going to be enough. Do you do them grade by grade, or skip out some of the intermediate ones. How long is it likely to take. He is a fairly bright and mathematically inclined child if that makes a difference.
I'm guessing loads of you guys must have been through this. What approach did you take and what would you recommend?