The Number Devil is pretty cool.

We gave our DD the SG Maths books to do at home - she devoured them. The stuff is very well presented and simple to follow she she taught herself from these books at an insane rate - not even realizing it was 'homework' LOL

Also try the SG challenge questions.

Beast Academy wasn't out when she was younger so we went right into AOPS pre algebra when she was in 4th grade but I have heard good things about it.

Become what you are