Sunnyday, look and see if there is a Julia Robinson math festival near you anywhere - I think it would really appeal to your DS.
Ooh, I'd never heard of that! There was one two hours from us last month, but none in our state for the rest of the year. Ah, well.
madeinuk, how did you use Singapore with public school? I have Singapore 1A, 1B, 2A, 2B, (most books including the HIG, textbook, workbook, IP) and 3A IP on my shelf. The last one is a decent fit for my DD8, who does like follow-the-steps math with a bit of challenge to it. But DS10 has embraced mind-bending math and advanced topics to a point that I don't really feel like Singapore is a good choice any more. That said...maybe the teacher will accept it since it's a well-known curriculum? I'd love to hear more about how it worked for you!