The purpose of this study was to determine the development of thematic ecolearning models in learning in elementary schools. This research is research and development (RnD). The research subjects were teachers and students at SDN 9 Langsa City. The results of the study provide the following descriptions: 1) develop a thematic ecolearning model by determining the theme, KI, KD, learning objectives, questions, validation tests, practicality tests and determining the final product of the learning model; 2) The item instrument is in the form of multiple choice as many as 25 questions and consists of 10 questions. Based on the validation test conducted by the experts, namely; thematic material experts get a score of 80.5% with "high" criteria. While linguists get a score of 90.5% with the "very high" criteria. From the evaluation experts get a score of 80% with the "high" criteria. 3) the development of an eco-learning model in learning in elementary schools through a practicality test to get the results of the teacher's response reaching 85% with the "high" criteria. Meanwhile, from the students' questionnaire responses with a total of 10 children, they got a score of 80% with the "high" criteria. From the results of the percentage of thematic ecolearning model development at SDN 9 Langsa City, it was declared feasible to use.