This summary describes what sexual harassment means and how common it is. The summary is based on a Finnish guide that more extensively discusses the means provided for in the Finnish legislation and curricula as well as the means provided through teaching and student welfare services to prevent and address sexual harassment. The summary includes guidelines for learning providers, headmasters, teachers, personnel of the student welfare services as well as other personnel in educational institutions, students and guardians. Both the summary and the guide concern the relationships between the students and between the students and the personnel in the educational institutions, and they do not concern possible harassment between the adults working in the educational institutions.