A blog is a personal, online journal, where users can read, and comment on your entries.
Check out the video "Blogs in Plain English" for a visual explanation of a blog.
Twitter is a social microblogging site that enables users to create social and professional learning networks. This free service allows you to share in short, 140 character phrases an answer to the question: "What you are doing?" You can also follow other Twitter users to see what they are doing. The limit of 140 characters requires users to be concise and to the point. Twitter is an informal way of staying in touch with others. One thing I like to share with people is that you DON'T have to have a Twitter account to follow others...you just need to know their user name.
from lesson-plans.theteacherscorner.net
Click here to sign up for Twitter! First, watch the short video to help you through the program.