Usage - Have not used in the classroom, but I find the delivery of the content to be more appropriate for web-based learning.
Ease of Use - Content is very easy to use, although abit lengthy and too wordy.
Prior Use - I have not personally used this tutorial, but I have developed tutorials discussing similar content.
Accuracy of Content - Found content to be accurate and reliable for the content discussed.
I found the fonts to be too small and the content appeared to be aligned to the left-side of the page.
Overall a clean layout and pleasant viewing experience. Tutorial loaded extemely well using Internet Explorer, Firefox and Chrome browsers. Quizzes and pop-ups add a nice level of interactivity, however the tutorial itself I found to be very lengthy in nature to be viewed in web browser.
Create separate (mini-tutorials) for easier comprehension for students.
Align (center) the content on the page and increase the font size for greater visibility.