The focus of the thesis is on drug addiction prevention in families. Education in the family is seen here as one of the key factors preventing substance addiction. In my work, I emphasize the need to inform and educate parents in this area and put forward solutions in the form of the project "Educating Parents in Children's Drug Addiction Problems". The purpose of the project is to publish a handbook for parents titled "Do You Know About Drugs What Your Child Does?" The publication will provide parents with basic information about drug addiction. In addition to theoretical knowledge about drugs, parents will also be offered practical advice and guidance on how to prevent potential problems with drugs in their children, on how to react when they learn about the child's experimentation with drugs and, last, but not least, how to act in the situation when they find out that their child is already drug-addicted. Prior to writing the handbook, quantitative survey of parents has been undertaken to map the situation in the area of drug addiction prevention in families. The aim is to include the results of the survey in the handbook in such a way that, e.g., its text, in some parts, will give details to the explanation of the problematic phenomena exposed by the survey. The survey is one part of an entire...