This is a great site for creating a website. It is easy to use, gives you lots of options to create an individualized and unique website, and could be used in any classroom (from preschool to college!) for creating a class website to keep students, parents, and teachers on the same page.
This is a collaborative document tool that has three different links so that you can customize your document depending on whether you are part of a workgroup, enterprise, or community. Teachers could use the workgroup version to collaborate on assignments or other things going on in the school. You could also use the community tool to collaborate with parents.