『30 Day Korean 3』 is organized into the following areas: 'Vocabulary', 'Grammar', 'Speaking', 'Listening', 'Reading', 'Writing', and 'Culture & Pronunciation'. The content of each area is closely linked to each other, so that learning language knowledge naturally leads to acquiring language skills.
Each lesson of 『30 Day Korean 3』 is about 5 hours long, so if you take offline classes or study on your own, it is appropriate to study one lesson every two days.
For reference, Green Korean Language Institute's online classes (www.onlinekorean.co.kr) utilize various forms of learning content such as animations, quizzes, and video lectures. Students self-study one unit of the textbook for six days, and on the seventh day, participate in a conversation activity with a native English-speaking teacher based on what they have previously studied. This learning method is called flipped learning.