Online and distance learning takes different forms but all aim to enhance the learning experience. A fully online course conducts all instruction online with both synchronous sessions requiring students to log on together and asynchronous activities they complete independently. The flipped classroom model has students learn lessons outside of class then do homework and activities in the classroom. A blended or hybrid course combines some traditional in-person sessions with online learning, replacing about 30% or more of face-to-face time with online work.