The purpose of this study was to identify: (1) the types of accidents and the areas in which they occur in the high school biology, chemistry, and physics laboratory; (2) the contributing factors that cause accidents; and (3) the preventive measures practiced, and the success of the preventive measures. Four hundred and thirty science teachers representing all fifty of the United States were sent questionnaires to gather the data. Data were analyzed for information for relationships of laboratory accidents with teaching experience, school enrollment, class enrollment, laboratory space, laboratory types, and individual and general laboratory stations. The second portion of the questionnaire was designed to procure information regarding: (1) the relationship of laboratory hazard areas to laboratory accident, (2) identification of contributory factors, and (3) identification of successful laboratory procedures. The general and statistical data provided significant relationship information leading to the conclusions: (1) generally, remedial groups have less accidents than others and advanced placement groups in general had the most; (2) class enrollment had a significant relationship to laboratory accidents as well as to laboratory space (3) fewer accidents occurred when individual laboratory stations existed; and (4) chemistry was more prone to laboratory accidents. (Author/EB)