This document outlines three proposed research studies on topics related to mental health nursing. The first study aims to assess the effectiveness of video-assisted teaching on adolescents' knowledge and attitudes about mental illness. The second study examines the impact of planned teaching on nursing students' knowledge of legal issues in mental health nursing. The third study will evaluate a structured teaching program on adolescent girls' knowledge of anorexia nervosa. For each study, the document presents the problem statement, objectives, hypotheses, need for the study, and overview of the methodology to be used.