Abstract
This study aims to determine the effectiveness of using chemical laboratory functions and tools in Public Senior High Schools throughout East Lombok Regency. The approach in this study uses a descriptive quantitative approach. The population of this study consisted of all high schools in East Lombok Regency. The sample for this study comprised six schools: SMAN 2 Selong, SMAN 3 Selong, SMAN 1 Terara, SMAN 1 Pringgabaya, SMAN 1 Sembalun, and SMAN 1 Labuhan Haji, which were selected using purposive sampling. Data collection used questionnaires and interviews; the questionnaire used was closed with a Likert scale. For the interpretation of problem data using the criteria of 5 categories (not effective, less effective, moderately effective, effective, very effective) which are determined by simple percentages and tables. Based on data analysis it is known that; 1) the effectiveness of the use of chemical laboratory functions in State Senior High Schools throughout East Lombok Regency has been effective (74.82%). 2) The effectiveness of the use of chemical laboratory equipment in State Senior High Schools throughout the East Lombok Regency has been effective (80.33%).