You can now login to the website for quizzes, feedback and comments. Creating a login allows you to take the quizzes at the end of some of the chapters. Your scores are also saved for future reference.
If you leave a feedback while logged in we can reply to your feedback. We appreciate anonymous feedback so don't worry about logging in just to leave a feedback. Feedback is only viewable by the site administrators and is useful if you want to let us know about spelling mistakes and typos.
You can also comment on pages and the comments are viewable by everyone. You must be logged in leave a comment and we delete messages that are spam or totally off topic. The page comments only open in late April 2013 so only a few pages have comments.