This study aims to produce LKPD products based on Discovery Learning assisted by Software Tracker to improve understanding of the concepts of class X students at SMA Sriguna Palembang that are valid, practical, and have a potential effect on understanding concepts. This study uses a modified Rowntree development model based on formative evaluation. The subjects used in this research are students of class X IPA 2 SMA Sriguna Palembang, as many as 34 students. This research produces: 1) LKPD based on Discovery Learning assisted by Software Tracker which is valid. Based on the research results, the average results of material aspects are 81.33%, learning design aspects are 80% and language aspects are 80%, 2) practicality test results in the one to one stage obtained an average of 93% with a very practical category, 3) the results of the practicality test at the small group stage obtained an average of 87.62% with a very practical category, 4) the field test stage obtained the highest N-Gain value by 64.70% in the high category and the lowest N-Gain value is 35.29% in the medium category.ÂÂ