Whoa! Where have I been? Google has an AdWords Learning Center?!?! I knew they had a blog about AdWords, but not an eLearning section.

From the site:

If you’re an AdWords advertiser, Google Advertising Professional, or just interested in learning more about AdWords, you can use our free training to sharpen your AdWords knowledge. We offer both interactive and text-based lessons to match your preferred learning style. While lessons are organized to build upon previous ones, you can skip between topics and take them in any way you like. After each lesson, test your knowledge by taking a quiz or exercise. Because so much is covered, you probably can’t complete training in one sitting (without the help of caffeine), so return often. Content is updated regularly to keep you current.

You can also check out the PPC Checklist found on TruthMedia’s Training Center I helped put together.