I use a wiki with my students because they are able to collaborate on the same wiki page. Blogs are good for threaded discussions, but a wiki allows for students to truly interact with each other. A wiki also allows for threaded discussions as well. What's nice about a wiki is that each student could have their own wiki page to add text, graphics, videos, etc. to demonstrate what they've learned but it can all be located within the same class wiki. It's an easier way for students to see each other's work as opposed to having separate urls for blogs.
But if she's really ambitious, she can open the final product to be anything...wiki, blog, podcast, glog... =) I think letting students choose the medium by which to demonstrate what they've learned gives them the freedom to show their creativity...something that is often left out of the curriculum in this day and age of standardized testing.
An interesting question, and many interesting points of view in the replys.
I began with a Blog for my personal site, reasons being a Blog is free and easy to create.
For students I use a Blog for these reasons, plus they can Comment to each other.
Yet for my own personal website I have changed to a web page, because it has a more professional look.
All three are website, so all would be applicable here. You can't really go wrong on the choice.
I would have to agree with Amy here though, that blogs might be the most beneficial as they can get feedback from others more easily.
I think only one is enough ,because you donot have so much time to manage them all.I think web page is best...
I would prefer a blog in this situation beause each student can have there own blog, plus respond to their classmate's blogs. Wiki's are nice but they generally require some upkeep and may not be as simple for students to post and respond.