The aim of this study was to create a Student Worksheet (LKPD) for fourth-grade students at SD Negeri 3 Karangbawang Purbalingga utilizing the ATONG-based of Cooperative type TGT model on theme 4 sub-theme 1 learning 1. This research used Research and development (RD) development methods to create student worksheet products. This study used a 4-D development model, namely: Define, Design, Develop, and Disseminate. Validation tests are carried out by expert validators to assess the feasibility of the developed student
worksheet product. The instrument used is a response questionnaire. The initial condition for student worksheet learning is only using student worksheets from the government. Specific characteristics based on ATONG (Observe, Ask, Exercise, Reason, Ideas), special characteristics related student worksheet components, and
general characteristics of student worksheet development were among the findings of this study. Validator 1 gave a score of 49, validator 2 gave a score of 36, and validator 3 gave a score of 40, for an overall average of 41.4 or on a Likert scale of 4.1 between 3.4 and 4.2 with valid criteria. Because the Likert score range was 3.4 to 4.2, the teacher's response was positive, with an average score of 4.1 and good criteria (not revised). The response of the teachers at SD Negeri 3 Karangbawang demonstrated that the LKPD created is feasible for use in learning activities. Participants in fourth grade at SD Negeri 3 Karangbawang responded positively, with a Likert score of 4.37 and extremely intriguing criteria. The research culminates in the creation of a useful worksheet for classroom