Recommend me good blog for English corner

We’ve lost our English corner room, and so I’m going to set up a blog for students to publish their work. I’ve used, and it’s fine, but wonder if there may be better ones around.

The criteria will be.

  1. Easy enough for 12-18 year olds to use and publish stuff on without too much help from me - some of these guys are not computer geniuses.
  2. Free to use.
  3. If audio and/or video can be uploaded, that would be great.

Any info would be appreciated.