Parental involvement is the biggest indicator of a child's success in school.
It's great if you can actually be in the school, but involvement doesn't have to be limited to the regular school day. By reading to your kids, listening to them, helping with homework and encouraging regular school attendance, your child will know you value education.
This website provides resources to help you stay active in your child's education. Please contact the principal or your child's teacher for even more ideas.