For eight years, the National Center on Addiction and Substance Abuse (CASA) has been engaged in surveying the attitudes of teens and those who most influence them--parents, teachers and school principals. While other surveys seek to measure the extent of substance abuse in the population, the CASA survey probes substance-abuse risk and identifies factors that increase or diminish the likelihood that teens will abuse tobacco, alcohol or illegal drugs. The annual CASA survey has consistently shown a correlation between frequent family dinners and reduced risk that a teen will smoke, drink or use illegal drugs. As a result, this year CASA sought to examine the relationship of family dinners to specific characteristics that increase or diminish the likelihood that a teen will smoke, drink or use illegal drugs. Appendixes include the methodology for CASA's 2003 survey and the CASA strategy for assessing the substance abuse risk of a teenager. (GCP)