Form elements range from buttons to inputs, checkboxes, selects and popovers. These are most commonly found in forms, but are also present in many other aspects of an interface.
Tabs can be used in a lot of situations to separate discrete actions or information that fall under a single context (for example enrollments and deployments within a class).
The top navigation contains the logo and links to the main pages of the site, as well as any primary CTAs.
The footer can contain useful secondary links that aren’t prioritized in the top navigation as well as copyright or policy information.