Marsia Adimani Ndruru. (2023). The application of a problem-based learning model to increase student learning activeness on ecosystem material in class x agribusiness of food crops and horticulture at state vocational high school 1 hilimegai in the 2022/2023 academic year. Journal of Education Innovation and Curriculum Development, 1(3), 75–79. Retrieved from https://journals.iarn.or.id/index.php/educur/article/view/240