· Take them to the library--get them their own library cards.
· Take them to museums and historical sites, when possible.
· Discuss the daily news with them.
· Go exploring with them and learn about plants, animals, and geography.
· Find a quiet place for them to study.
· Review their homework.
· Meet with their teacher.
Do you have other ideas?
Source: http://www.ed.gov/pubs/parents/Get Ready For School/WhatCan.html