Are you looking for a site with copyright free pictures for you and your students? Try Morgue File. Photographers put their unused pictures on this site for teachers and students to use.
This is an elementary site with some uses for everyone. It lets you make word clouds that are easy to print. There are games for the different grade levels, K-5. These are all free.
The title says it all. You click on the link to create a document and then invite others to type on the same page with you. Each person is color coded so the others can tell who typed which part. Great for using with collaborative groups. It is easy to tell if everyone is doing their part of the project. So simple to use!