Best Practice to Accept Google Classroom Invitation
The teacher sends you an email invitation to receive Guardian Email Summary
Use a computer to accept the invitation (do not use mobile phone or iPad)
Open a private browser (e.g. Incognito Mode in Chrome)
Sign into your @cdnis.hk Google account via http://gmail.com
Open the Guardian Summary Invitation email and click "Accept" (Google has an issue with this currently, and you may see a blank screen afterwards).
You and your child should receive a confirmation email if the invitation has been properly accepted.
By default, Guardian Email Summary will be delivered weekly (frequency cannot be changed at this moment due to Google's blank screen issue).
Google Support is aware of the issue with Google Classroom. The issue has been filed and the internal product team will keep us informed when updates are available (Sept 15, 2021).
For further information to Guardian Summary, please visit the link below.