I felt this site was very user friendly. It was easy to navigate both forward and backward and always know where you were at. The problem sets available on this site allowed for an answer to be chosen and any incorrect answers received a short tutorial to explain the correct answer. The site also contained a vocabulary page and other relevant information.
I spent a significant amount of time completing the problem sets and browsing the vocabulary pages. I then created an assignment that utilizes this website. The quality of content is excellent, and it has great potential effectiveness to enhance teaching and learning.