This is a literacy website for preschoolers. It has resources for online activities, children's literature, technology, webquests and lessons for the young child.
This site is a list of internet resources that help classroom teachers. There are resources on classroom management, curriculum, teacher/parent/student relationships, professional organizations, literacy and much more!
This site is developed by the American Federation of Teachers. It has many relevant topics. It has a great section titled "hot topics" that provides information on topics related to Professional Development.