If you would like to check your personal email on your school laptop, or keep your personal browsing separate from your school browsing in general, you should create a second profile in Google Chrome. This profile will keep your browsing history, logins, cookies, and all other browsing data separate from your primary Teacher account.
In Google Chrome, click the People menu and choose Add Person… (A).
A new window will open, and you will be prompted to sign in with a Google account. Sign in using your personal Gmail account. After agreeing to the prompts, you will see your user icon in the top-right corner of the Chrome window (B). This icon indicates that this browser window is signed into Google Chrome using using your personal account profile.
If you don't have a personal Gmail account, you can follow the steps above the create a second profile, but skip the signing in process. This will still give you a personal profile for browsing in Google Chrome, but it won't be synced with your Gmail account.
The next section describes how to switch between your teacher and personal Chrome profiles.
Switching Profiles in Chrome
You can switch between profiles in Chrome by clicking the People menu and choosing another profile, or by clicking your user icon in the top-right corner of the chrome window and choosing a different profile. If you don't have any other profiles listed, you can add another by following the steps above, using a personal Google account to sign in instead of your teacher account.
This will switch you to another Chrome browser window which is using this profile, or open a new window if one doesn't already exist. Your previous window, using the other profile, will remain open in the background. This way you can easily switch between profiles to access your personal Gmail and a school Google Doc, for example.
It can be easy to get confused about which profile you are currently using; if you have trouble, always take a look at the user icon in the top-right on your chrome window to make sure you're using the right profile.