Validity of Flipped Classroom on Guided Inquiry in Acid and Base Solution

The COVID-19 pandemic has shifted the face-to-face learning process to online. According to the demands of the 2013 curriculum, students play an active role in learning. Guided inquiry is a learner-centered learning model and can find a concept. A Flipped classroom is a learning system that can cope with online learning. This study uses R&D with a ploomp model, obtaining data from media experts with an average of 0.87 categorized with high validity, and the average obtained from material experts in chemistry is 0.84 categorized with high validity. While the average value of practicality obtained from students is 92% categorized as very practical and data obtained from high school teachers is 89% categorized as very practical.