What it is: Current.im is a site I learned about from @MZimmer557 on his excellent blog, The Weekly Pursuit of Technology Integration Happiness.  Current.im let’s students keep a private online journal 140 characters each day.  The journal couldn’t be easier to use, students login with a username and password that they create, and type their 140 characters for the day.  Current.im keeps a daily record of these bits of writing along with a time stamp.  The Current.im is truly private, this isn’t a social sharing site where students (or teachers) are writing for an audience.  It is a wonderfully simple…