You can certainly do this. To select which course elements will impact the final grade of a course;

  • click the Manage Courses tab
  • click the name of the course you want to edit
  • click the Course Element Grading sub-category tab
  • select the Override the system defaults for some or all types of course elements radio button
  • select the Override the course default for some or all elements radio button
  • set your desired override weight for every element within your course
  • click the Save button
You should only do this after you have created and activated all course elements otherwise you will have to repeat this step after you activate each new element.