Question items material symptoms of global warming in the form of a description test to train ideation thinking in student high school class XI

This research aims to develop the subject of global warming symptoms in the form of a description test to train talent ideation in Grade XI High School Students that deserves to be used as a learning evaluation. The method used in this study is Research and Development (R&d) with the djemari mardapi model. The steps are to compile test specifications, write test questions, study test questions, fix test questions, test trials, analyze test items, and interprets test results. The subject of global warming symptoms in the form of a description test to train talent ideation is validated by five Expert Judges by providing a likert scale questionnaire and analyzed using the Aiken formula. Validation results from 31 details of the description question show validity ≥ 0.80, then the entire item is declared valid and can be tested to students.