If you selected a template when creating the Resource List, your list will already have Sections, which are used to structure the Resource List. To add a new Section, just click the “New Section” button:
Section Titles could be Week 1, Module 1, or something more thematic, like in the screenshot above. Description is optional and Start Date and End Date govern the visibility of the section to the public. If you want to slowly reveal the Sections of your list, use Start Dates and End Dates to control when they become visible to students.