I (maybe somewhat) disagree with DeeDee on this. If your child can work out how to answer Aleks' questions without instruction, that's a feature, not a bug: it leads to deeper understanding than being told. It is important that a child using Aleks has access to someone who can explain if necessary; and Aleks has no non-routine problems so you need to supply those separately. But a quick wizz through the first few grades of Aleks was great for my DS at 5/6yo. It used to start at third grade; not sure if it still does, but I wouldn't let that put you off if so, as in practice it also v has much easier material embedded.
