A) I used the plugins 3D rotating cloud, Calendar +, and Wiki

B)The strengths of the 3D rotating cloud is that it makes the Tags Cloud looks nicer, The calender adds a personal calender to my blog, and the Wiki allows me to make a wiki page from my blog.

C) The weaknesses are that only aside from appearance they have little use.

D) Yes, the Calender can be useful for students because it would allow them to be able to put in due dates of homework into their blog.