There may be some situations in which you would prefer users interact with your product outside of an iframe. You can load attachment content in a new tab rather than in a Classroom add-on iframe as long as your add-on conforms to the following guidelines.
Required behaviors in new tabs or windows
The Classroom add-on requirements checklist specifies certain behaviors when opening new tabs or windows. The following table provides clarifications and implementation suggestions regarding each requirement.
| ID | Requirement | How to meet | 
|---|---|---|
|   
3.2 | If a task is launched into a new tab or window from any of the iframe journeys, it MUST provide a user-friendly message to return to Classroom. | On the external site, include a message, banner, toast, or other notification instructing the user to return to Classroom when finished with the task. | 
|   
5.1 | When the studentViewUriis
launched, the
add-on
SHOULD NOT pop the user out of
the iframe to complete a task. | Ideally, users are able to complete all relevant journeys within the iframe. Opening new tabs can disorient users and adds to the complexity of using the add-on. Keep the user experience within the iframe to provide the least user friction. | 
|   
5.2 | If the add-on activity pops out of the iframe there MUST be a preview about the task in the iframe. | Don't open the external site immediately when the user clicks the attachment card. Instead, provide a basic interstitial view in the iframe showing an image or description of the task that opens in a new tab. Include instructions to help users successfully navigate and complete the activity. | 

