I first posted about this last September but was recently reminded of it with a Tweet. Sorry, but I just can't remember who shared this!
New Hampshire Public TV has a great writing program called the Write-n-ator. Students watch a brief video clip and take the challenge suggested in the clip. There is a space for students to submit their work but I am thinking you might just want to share the video and challenge with students and have them write on paper or with Word. I do not believe there is a print option for the completed projects. There are 20 challenges with great vocabulary mini-lessons that could supplement your writing lessons. If you check on the teacher tabs for each challenge you will see the associated NH objectives with suggested grade levels.