You can use learning modules in your course as containers for organized collections of content. Modules let students navigate from one content item to the next without distractions or extra clicks. A learning module helps immerse students in the lesson or concept you're teaching. If you use a textbook or other materials as the basis for your course curriculum, modules are an effective and logical way to group content to match the pace of these materials.
Use a learning module to support a course objective, concept, or theme.
More info: https://help.blackboard.com/Learn/Instructor/Ultra/Course_Content/Create_Content/Create_Containers_for_Content/Create_Learning_Modules