Think.com is the suggested alternative to blogs for students by MisterTeacher. His post explains why he’s switched and what students can do at Think.com.
I’ve placed a lot of direct links to many websites in the Think.com Thinkquest Library, which has a yearly competition for students to create useful websites. However, I’ve never really paid much attention to what else it has to offer.
I’ve placed the link on my Teacher’s Page under Blogs.