TeacherCast uses Screencasts to show off software, websites, and other goodies. There are Audio Podcasts of interviews w/professional educators. There are collections of all kinds of goodies: apps, websites, and other items that will whet the whistle of teachers all around.
So, whether you are hunting a review, a li'l educational podcast or screencast, or a peek at their wall of links of fame, there's plenty to check out.
Letter T in sign language: http://www.easyvectors.com/browse/other/sign-language-t-clip-art; TeacherCast iconry from their website.