Feedback from at least one student suggests that this quiz is very repetitive (confirming my original opinion). In that case, feel free not to do this quiz...just look at the reading that follows
It's a fairly repetitive quiz but based on good science.
I can see this being used with small groups of students for collaboration, it's simplicity would lend itself well to primary school. However after playing around with it and creating 2 accounts and joining a private notebook I found the process slow. So for a whole class collaboration application I would suggest using WikiSpaces: http://www.wikispaces.com/