Teacher tips, lesson plans, articles, themes, printables, teacher forum, and more. Free materials separate from products, which are available at the A to Z Teacher Stuff Store.

Like a huge theme park, this site could take days of exploration to see it all! Online exhibitions, ongoing research, links to national museums, and separate sites for kids and teachers, the latter with printable lesson plans.

Thousands of free printables in a wide variety of subjects and applications. Worksheets, themes, maps, forms, and more - membership allows full access including customizable worksheets, but this is a valuable resource even without membership!

Free worksheets with answer keys, plus a great variety of worksheets as well as customizable printouts for subscribers. Also has literature units, art projects, themes, reading comprehension, test preparation, and classroom helpers such as calendars and graphic organizers.

Great interactive lessons, online practice games, and printable worksheets for math and language skills. Grouped by grade level: K-2, 3-4, 5-8.

A fun site full of online games and practice worksheets which check themselves. Subject areas included are math, language arts, geography, biography/history, and animals/environment.

A multitude of mini-lessons in all subject areas, each including tutorial video clips, quizzes, timelines, and at least one printable activity page. The majority of the lessons are available only with a subscription, but each subject area includes at least 5 free lessons.

A free resource packed with informational pages and online quizzes and activities, arranged by topic. Includes miscellaneous subjects such as computer programming and test preparation.

Nice collection of activity worksheets sorted by subject area including preK to K, math, English, spelling, geography, history, and science. Also includes reading tips with lists of skills that should be mastered by each grade level.

Games on a variety of topics from a wide range of sources. Some of the best educational online games can be found here! Separated into two levels: Grades PreK-2 and 3-6+.

Large selection of free worksheets and other resources, along with extra benefits for paying members. Classroom organizers, teacher tools, message boards, and ideas for all subject areas.

This site by Houghton Mifflin offers an abundance of lesson plans/activity ideas organized by topic, as well as monthly themes and some printables and online games.

Lesson plans, relevant websites, and book lists for a wide variety of topics, more being added on a monthly basis.