This afternoon the official Google Docs blog posted a collection of eleven academic projects that incorporate the use of Google Docs. All of the projects in the list were developed by practicing educators. There are projects for science and social studies. Teachers will also find ideas for rubrics and evaluation forms in the collection.

Here are some additional resources and ideas for using Google Docs in the classroom.
Bibliography Templates for Google Docs.
Eight Ways to Use Google Docs from Tom Barrett
Give An Old Lesson New Tricks