Making a Virtual Laboratory in Isolation Practice Caffeine from Tea Leaf Extract (Camellia sinensis)

The limitations of students in carrying out practicum activities during the pandemic by showing only visual recordings of the practicum have less effect on understanding the material, so a virtual laboratory is needed. This study aims to describe the appearance of the virtual laboratory and analyze the results of the validity, and feasibility of virtual laboratory media in isolating caffeine from tea leaf extract. The research method used is Design-Based Research (DBR) with presentation drag and drop, virtual laboratory media display is presented inflow chart and storyboard. The created media view contains the initial view, the menus in the media, and the rules for using it. After that, the media was tested for validity by three expert validators from the Chemistry Education lecturer at UIN Sunan Gunung Djati Bandung. The results of the validity of the average value count of 0.84, which means it is greater than the value of critical, which is 0.30. So that the media is declared valid and can be tested, limited to ten students of Chemistry Education who take the Advanced Natural Materials Organic Chemistry course, the results of the feasibility test get an average percentage value of 85.88%, with a feasible category so that the virtual laboratory media in isolating caffeine from tea leaf extract can be used as an alternative medium in the learning process.