For 7-12 Band and Chorus, check Microsoft Teams.
Go to https://www.office.com/ and login with your school email address and password (like you are logging into a computer in the computer lab). You can either use the browser version or download the desktop app. The apps tend to be more stable.
OR
Download the free Microsoft Teams app for your mobile device in your app store and follow the same login steps.
All of your Phase 3 assignments and materials are there, 7-12!!