When I have my students explore online services and provide an analysis, I always ask that they offer information on whether the site allows any controls over access. Privacy issues can be an important consideration in K12 classrooms.
Google sites is a great and free tool for creating web sites. Google is rolling out a new feature that allows the creator of a site to control who has access.
If as a Google user you have been updated, you will find the new features under “sharing and permissions”. You will find these settings by clicking the gear icon that appears at the top of the Sites page. You change the permissions to limit access and you invite those you want to have access using sharing.
With permissions, you will want to select “shared with specific people.
After you have indicated that only those you invite should have access, you use sharing to identify these individuals.