Self-learning means that students study worksheets and correct their own mistakes independently. The worksheets have been designed in a way to allow students to figure out how to solve problems on their own. Examples and explanations are clearly provided when moving on to new topics, encouraging students to self-learn and advance independently. Instructors observe how each student studies, plans and assigns worksheets and motivates the student. When students encounter difficulties, the Instructor assists the students by giving subtle hints so that they will be encouraged to progress and take on further challenges.