What sharing setting should be used for a document intended as a reference guide for teachers?

Using the sharing setting "Anyone with the link can view" ensures that all intended users, in this case, teachers, can access the reference guide without the ability to make changes. This setting is particularly useful for documents that contain important information or guidelines that need to be referred to by a wide audience. It strikes a balance by allowing easy access while maintaining the integrity of the content since viewers cannot edit the document.

Restricting access only to a specific group would limit the potential audience, making it less convenient for all teachers who might benefit from the document. Allowing anyone to edit the document could lead to unintended changes or misinformation being introduced, which is not ideal for a reference guide. Making the document public on the web might expose it to a much broader audience than intended and could lead to issues of privacy or misunderstanding, especially if the content is sensitive or specific to a particular educational context. Therefore, the "Anyone with the link can view" option is the most appropriate for sharing a reference guide intended for teachers.