The following websites are free, and require no membership for access to lesson plans, worksheets, printables, and other resources:

www.atozteacherstuff.com

www.abcteach.com

www.schoolexpress.com

http://www.educationworld.com/

http://www.first-school.ws/ -- I highly recommend this website for primary teachers!!

www.educationalpress.org--This free online tool helps you create educational worksheets such as flashcards, quizzes, and game boards to print directly from your browser.

http://www.montgomeryschoolsmd.org/curriculum/pep/pz.html-- Pre-school resources




If you are a teacher in need of class supplies, you may want to visit http://www.iloveschools.com/ which allows you to enter the items you need, and can connect you with someone who desires to donate to teachers in need.
A new website with this same concept is about to launch. It is http://classwish.org/ and it will connect teachers with donors.


And if you are always on the lookout for freebies, visit About.com's Teacher Freebies page which keeps you updated on new freebies especially for teachers.