With the wide variety of courses and lessons, there will also be a wide variety of how users earn credit and points when completing tasks. This is the simplest way to designate "weighted" tasks.
Go to Learning > Click Points Categories > Click New
Give this category a Title, Category Icon, Description, and if this category will be published or unpublished.
When creating a Course or Lesson, this category will be selectable when "Award Points" is toggled "Yes" in the "Details" tab.