Education training for nurses currently includes classroom teaching through speeches, film/website teaching, group discussion and practice, and classroom teaching is most popular one in nowadays. Materials the investigators use to teach suicide assessment such as interactive website which provided by Taiwan Nurses Association and books are also available for nurses for self-learning. Concerning the importance of discussion and evaluation of suicide risk, and the realization of suicide risk based on a case vignette, also the interactive learning between trainees and facilitators, the investigators choose using interactive discussion group as our teaching policy, and via the randomized controlled trial the investigators can evaluate the effect or research interventions.