Depending on your version of Android, them menus or options may be slightly different. The process for adding your school email is the same as adding another Gmail account.

1. Launch Settings from your Home screen, the app drawer, or the Notification Shade.
2. Swipe up in the Settings menu to scroll down.
3. Tap Accounts.

4. Tap Add Account.

5. 

6. Tap Google.

7. Type in your school email address in the provided field. 

8. 

9. Tap Next.
10. Type your password.
11. Tap Next.