"Textbook Revolution is a student-run site dedicated to increasing the use of free educational materials by teachers and professors. We want to get these materials into classrooms. Our approach is to bring all of the free textbooks we can find together in one place, review them, and let the best rise to the top and find their way into the hands of students in classrooms around the world."

"From Harry Clarke to 1890's storybooks, if you're looking for unique images or clipart for use in your web pages or in other design or craft projects you've come to the right place." As far as I can tell, these images are all public domain or are no longer copyrighted. Another good source of "vintage" images is gutenberg.org

Feedbeater allows you to create an RSS feed or email alert for any webpage. Very helpful when you want to stay on top of a site that does not have an rss feed.

Abstract: "This paper addresses current definitions of quality in online assessment and examines emerging expectations of what constitutes appropriate online assessment. A case study is presented of a Web-based assessment framework that is both interactive and product-oriented and involves learners in making contributions to course resources through learning activities. It is proposed that an interactive participatory model of assessment utilises the communicative features of technology while affording a motivating and authentic assessment experience."

A comprehensive checklist in PDF format

"Although a majority of states do not require financial-literacy classes in K-12 schools, the nation's recent economic struggles have spurred growing interest in the subject by educators-many of whom are turning to digital-game-based approaches to teach students about personal finance and investing."

"Google Wave is a new web-based collaboration tool that's notoriously difficult to understand. This guide will help. Here you'll learn how to use Google Wave to get things done with your group. Because Wave is such a new product that's evolving quickly, this guidebook is a work in progress that will update in concert with Wave as it grows and changes. Read more about The Complete Guide to Google Wave, and follow us on Twitter for updates and Wave tips. " Extremely helpful for any Wave newbie. I really recommend the section on public searches.

A very thorough list of collaboration tools. Note that there are no descriptions, other than the categories each tool is listed in, but most have links to their respective websites. A great place to start if you need to look for collaborative tools!

In beta, this web-based app takes static documents to create interactive media using hotspots. The hotspots can be images, text, files, or video. It's free and very cool. Try the Tour to see what it can do.

"Create Great-Looking Interactive Quizzes (in minutes) - embed in any website / blog!" Requires a free account.

"Create beautiful presentations, access them from anywhere, and share them with the world. With 280 Slides, there's no software to download and nothing to pay for - and when you're done building your presentation you can share it any way you like."

Convert any file into a web site. I can see where this might be helpful for people who don't have access to a WYSIWYG editor, don't have time to build a page from scratch, or have server space. The resulting page, according to the website, is public but has an unique web address so be wary of what is put up online.

This really is a nice list of sites that is applicable to any subject you teach.

"We collected over 50 useful and practical tools and resources that will help you to improve your writing skills. You will find copywriting blogs, dictionaries, references, teaching classes, articles, tools as well as related articles from other blogs."

100 ideas to give you a reason to mindmap