I am growing dissatisfied with ALEKS. DS is disinclined to click "explain," so he's not getting much actual instruction. He is nonetheless 4 grades ahead of his assigned grade/age level, finishing 7th grade ALEKS as a 3rd grader. Thinking about switching to Singapore Math, but I'm not sure what I'd have to buy.

It's nice that they have placement tests on the site, so I'm not too concerned about level. Reviewing a little wouldn't kill him in any case. What I'd like to know is this: is just buying a Primary Math Workbook enough? Or do I need the textbook plus workbook plus home guide in order for this to work?

I don't see where Singapore includes geometry constructions and that sort of thing (bisecting a line with a compass, etc)-- and I would love for DS to have more practice with this. Anyone know of good paper-and-pencil resources for practicing these skills?

Thanks,
DeeDee