Are you a creative teacher who wants to customize an integrated language arts or math lesson? Then, you need to check out Lesson Writer and NiceNet. These are free websites that allow teachers to create lesson plans using their own materials or using articles they find online. And for teachers who are assessment conscious - who isn't these days?, there is a truly convenient Easy TestMaker. All you have to do for any of these sites is sign up with a valid e-mail and create a password. Voilà!
Here's an example of a page (downloaded first as a pdf) that I transferred to a Word Document, so that I could join it up to other test pages created in Word. TestMaker is a huge timesaver. You can do multiple choice, cloze, true-false, and matching tests, format into a single column or multiple colums as you like. It will create an answer key for you, too.
On the other hand, if you're having one of those days when your mind is on hold and you just want someone to hand you a lesson, check out Teachers First. These lessons are primarily designed for K-12 students, but there's endless material for ESL instructors here. Again, this is a free website.