If you have been given a MacBook Air to use for work, you MUST change your password using your MacBook. You will also need to be connected to the school wifi network in order to change your password.
If you change your password on a Windows PC, your MacBook will not not sync with your new password and you will need to submit a help desk ticket to have it fixed.
ADPassMon is a password monitor that is on your MacBook. It gives you a quick look at the number of days you have left before your password expires.
To change your password, click the [0d] icon along the top of your screen and select "Change Password."
From there, enter your old password and enter a new password. When you click "Change," your password will be changed. This password will sync across your Google account, all district computers, Infinite Campus, Canvas, and more.