You use Google Classroom and want to create assignments with DocsPlus files attached.
Google Classroom works best with common file types. Broadly, these are:
The full list of supported file types is here:
https://support.google.com/drive/answer/37603
Other file types can be used. However, the experience isn't as streamlined.
To open a DocsPlus file attached to an assignment:
To submit a DocsPlus file:
Unfortunately, Google Classroom for iPad isn't designed for using unsupported files.
Therefore, we recommend using Google Drive to share DocsPlus files with iPad users:
https://support.google.com/drive/answer/2494822
It's often best to create a folder and share it with other users. Files can then be freely saved into it and become available to other users automatically.