FAQ, and support.
Click the colored circle next to any page name in the sidebar → pick a new icon and color.
Open the Assignments database → click on the Subject property → add/edit options. You can add as many subjects as you want.
The Weeks database uses Week Number (1-52). You can rename weeks to match your school's system: "Fall Week 1", "Spring Week 1", "Term 1 Week 1", etc.
Download the Notion mobile app. Star this page (top right → Add to Favorites) so it's always one tap away.