Development of Auditory Intellectually Repetition (AIR) Collaborative Investigation Learning Model in Improving the Ability of Writing Text Reports of Observation Students of Class X SMK Negeri 11 Medan

This research is motivated by the existence of problems in learning to write text reports on observations. The problem stems from the complexity of the material process for writing observational report texts, which often become material that is less attractive and students' enthusiasm in learning non-creative observational report material. Based on this, this study aims to produce an auditory, intellectualy, repetition (AIR) collaborative investigative group model in improving the ability to write observational report texts for Class X SMK Negeri 11 Medan. The research method used is the method of research and development of the Thiangarajan system using 4-D Define, Design, Develop, Deseminate. The development stages are the initial study phase, initial product development, and product testing. The results of material expert validation on the feasibility of the material obtained an average of 89.1%. with the category "Very good" For the graphic assessment by design experts obtained an average of 95.1% with the category "very good". Product trials were carried out in three stages: individual testing, small group trials, and limited field trials. Individual trials with an average of 86.1% in the very good category, small group trials with an average of 91.2% in the very good category, and limited field trials with an average of 88.99% in the very good category .