Use the Google Play Store on the Chromebook if it is enabled by your school
Search for Clash Royale in the Play Store
Install the game if it is allowed
Open the game from the app launcher
Sign in with your Supercell ID or Google account
If the Play Store is blocked, use the browser version only if your school allows it
If Android apps are disabled, ask your school IT administrator for permission
Make sure the Chromebook supports Android apps
Update Chrome OS before trying again
Check that you have enough storage space
Use a stable internet connection
Play only during approved free time
Follow your school’s device and internet use rules