School physics teaching materials problem-oriented topics fluid wetlands through approach Contextual Teaching And Learning (CTL) has not been optimally used in SMA PGRI 4 Banjarmasin. This adversely affects the learning outcomes. Therefore research material development through an approach Contextual Teaching And Learning (CTL) which aims to develop teaching materials such as lesson pl... https://www.allfixelectricales.shop/product-category/wifi-3g-4g-router/