The <learningContent> topic type contains the instructional content of a course. Depending on how your course is structured, a <learningContent> topic can serve as a single topic within a lesson or a lesson within a course by organizing the <learningContent> topic within a map. It can also serve as an entire (short) course if you embed other topic types like a <task> or <learningAssessment> within one <learningContent> topic.
The instructional content is written in the main body element, <learningContentbody>, or it can be written in other DITA topics that can be nested within the <learningContent> topic.