In particular, I am addressing to those who have difficulties to understand parts of the whole subject and fill those gaps and provide a complete picture of the needed lesson/principle/system/concept etc.

Connecting to this, further explanations and tasks would be provided to allow a deep understanding and expand the knowledge among surrounding disciplines and allow to sort in the concept/principle etc. into the "whole picture".

Certain things need practice in order to be understood. Here, exercises are available to be done off-course and corrected together in the next session.