The major purpose of this study was to develop and test the effectiveness of an in-service safety workshop for vocational agriculture teachers in improving laboratory safety scores;The population of the study consisted of vocational agriculture departments in the southeast district of Iowa during the 1980-81 school year. The design of the study was a posttest-only control group design;The experimental treatment group of teachers from ten schools attended a one-and-one-half day safety education workshop. The workshop was designed to provide instruction to vocational agriculture teachers on the need for laboratory safety, the recognition of health and safety hazards, and techniques and materials to improve the laboratory safety score. Laboratories from the control group (ten schools) and the experimental group (ten schools) were independently evaluated by the vocational agriculture teacher from each school and the researcher. The instrument used to gather data was developed by Everett (1980) and revised by the researcher. Analyses of data included: frequencies of responses, ranges, means, standard deviations, product moment correlations, t-tests, and analyses of variance;Major findings of the study were as follows: The five instrument items having the highest safety priority index (highest degree of non-compliance and highest rating of importance) for both treatment groups were: G.F.C.I. available for outdoor use, soap suds cup available for testing gas leaks, respirators provided for use, each tool provided with a "Lockout System", and safety rules posted near each stationary tool. No significant relationships were determined between selected facility, program, and teacher characteristics and laboratory safety scores. No significant differences were determined in mean laboratory safety scores when measured by: (a) teacher scores, (b) safety specialist (researcher) scores, and (c) combined scores. No significant interaction existed between evaluator type and treatment group in mean laboratory safety scores. The five-week period between the treatment (safety workshop) and the laboratory safety evaluations may not have been sufficient to allow the experimental group participants to apply what was learned in the workshop.