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Abstract. Science literacy is one in HOTS (High Order Thinking Skills). Science literacy is one of the skills needed by students so that students have the ability to solve HOTS problems. One way to measure scientific literacy skills is to use scientific literacy instruments. Several studies have been carried out in the development of scientific literacy instruments, but there are still shortcomings in their development. Some researchers also provide advice on the development of subsequent scientific literacy instruments. There are several shortcomings in existing scientific literacy instruments, including those that have not raised aspects of inquiry, critical insight. In addition, the existing forms of scientific literacy instruments still need development. Then the item analysis method used still uses the classical data analysis method, but some have used analysis items using IRT (Item Response Theory). These shortcomings can be minimized by changing the form of scientific literacy instruments to be more interesting or can measure more than one ability. In addition, the item analysis method of using IRT is one of the recommended methods of data analysis compared to classical analysis methods.