Another tool that is very useful to the classroom and the teacher is Symbaloo.  This website can be an extremely useful tool to help keep all of your resources in one convenient location.  You input your online resources that you want your students to view.  For instance helpful math websites, sites to read online stories, sites to work on creating an online story, and sites for a break or sensory time.  All of this can be color coded to match the same subject area. This can be your screen when your computer is opened so your students have exactly what they need right there for them.  Not only is this helpful for the students but it is very helpful for the teacher creating one less step during class time.  The best part it is FREE!