Suicidal behavior is a serious public health concern that has prompted the development of prevention strategies, which include increasing. community members' knowledge about suicide. Given that teachers are in a key position to recognize and respond to suicidal behavior, this study examined teachers' knowledge about suicide to identify how they need to be educated relative to its prevention. 82 Canadian school teachers from middle and high schools were administered a revised version of the 32-item Facts on Suicide Quiz to examine their knowledge of suicide. Analysis indicated that general information about suicide was limited, while knowledge of clinically relevant information about suicide, e.g., "Suicide rarely happens without warning," was relatively high.