Resources to help an 8yo struggling with math Friends of mine asked me for suggestion for one of their children (age 8) who had bad scores at the local Star test (the family is based in California).
Both parents work, so they have also limited time/energies to go through math exercise with the kid (or may have time only at the end of the day, when the student's energies are depleted, too).
This is not to say that anything requiring parent support should automatically disqualified - it's just to make clear that parent assistance could be a limited resource, so either something that can be done more or less alone by the student, or that gets maximum bang-for-the-buck for the parents time would be preferred.
Books (including exercise workbooks)? Software? Online videos? Games (boardgames, computer games)?

In my personal opinion getting him interested in mathematics is the best way to get him to get better at it hands down. When I was a kid I played math games for kids on my computer and I would also compete against my mom to see who could answer basic arithmetic question (mabye TMI).
In other words if you can get the kid interested in math you are sure to see positive results since the key to proficiency is practice, and if there is passion the kid will practice without external motivation. Hope this helps.
