Things to consider

1. Briefly discuss how you can use the blogs, wiki OR podcast in language teaching.

: Blogs and wiki and podcast can be used in language teaching methods are many. One of the mothods is post on their's blog about their's think about today's class and Assignment submission. And students can scrap in the other blogs that have good contents. Students can be use effectively the blogs.
Also wiki and podcast can be used in language teaching. Especially podcast is very useful. Podcast is can raise their's voice on the website (podcast). Students can record their's voice and listen,too. Also teacher can listen student's voice and give teacher's advice on pronunciation and something.

2. Discuss the difference between a blog and a wiki.

: Blog is use personally, but wiki is can be used a group (several people can use personally or with together post in wiki and revise their's contents). In the case of blog, an contents for posting on the blog only I can delete and modify the contents. But, wiki is other people (Even to strangers to me) can delete and modify the contents.
blog is suitable for private use. Because only for their own space.But, wiki is suitable for team project. Posing on the wiki, other people can delete and modify the contents. Therefore, as a team project and team working is wiki better than blogs.