This study aims to produce a salt hydrolysis worksheet based on discovery learning to measure the validity and practicality of the worksheet. Worksheets arranged in a discovery learning model and equipped with multiple representations. The research method is a research and development using the Plomp model which consists of 3 phases, they are 1) preliminary research, 2) prototype phase, 3) assessment phase. The subject of this research was conducted at SMAN 5 and SMAN 8 Padang. The validity test was carried out by 4 chemistry lecturers in Padang State University, 1 chemistry teacher at SMAN 5 Padang and 1 chemistry teacher at SMAN 8 Padang. The practicality test (field test) was carried out by 35 students of SMAN 5 Padang and 35 students of SMAN 8 Padang. The result of the study found that discovery learning-based worksheets had a validity level of valid categories

Keywords : Discovery Learning, Student Worksheet, Higher Order Thinking Skills, Salt Hydrolysis Material.