SAMHSA's underage drinking prevention campaign helps parents and caregivers start talking to their children early about the dangers of alcohol.
National Council on Alcohol and Drug Dependence shares common signs for parents to look for.
NIDA provides a wealth of knowledge and resources for parents including guides for preventing drug abuse and for seeking drug treatment.
A DEA resource for parents, educators and caregivers.
An organization working to reduce substance abuse among adolescents by supporting families and engaging with teens, their website provides a Parent Toolkit.
NIAAA supports and conducts research on the impact of alcohol use on health and wellbeing and provides publications directed at parents including Make a Difference: Talk to Your Child About Alcohol.