Prezi - a program for making more creative and interactive presentations.
E-pals - find global teachers and classrooms to network with.
Skype - communicate and interact with other global classrooms.
Facebook Groups - create groups for your students to study, share, and/or support one another.
Diigo - allows you to archive important web information that can be viewed, shared, and discussed by others.
EasyWhoIs - allows you to determine who owns a web address.
Wolframalpha - solve or analyze just about any query.
Wolframalpha for Educators - browse and/or submit lesson plans.
Khan Academy - has instructional videos on nearly any topic.
Mathtrain.TV - math videos.
MediaCast- pool of various resources submitted by and for Newton employees.
Poll Everywhere - create a poll for instant audience feedback.
Socrative - Socrative is a smart student response system that empowers teachers to engage their classrooms through a series of educational exercises and games via smartphones, laptops, and tablets.
Science Magazine - article on a better way to teach and much more.