So I can across Storybird which is a free site that teachers can create an account with to have students write their own stories. A free teacher account allows you to add up to 3 classes and 75 students. There are of course paid options as well if your school/department has the funds.
One thing that I liked best about Storybird is that it already has pre-loaded illustrations on it. You can search by a word and you will find illustrations that match that word and use them in your story, so students don't have to create all of the illustrations themselves. They can try to be very creative to write their story around the illustrations.
The other aspect of Storybird that I thought was neat was a teacher and pre-load or pre-choose a picture or pictures and have students use them to write their story about. This would be a really neat way to have all students write using the same illustrations and see all of the different ideas they have for their story and how creative our students are.
Here's a story I made for my Spanish II students as a practice.
How do you think you could use Storybird in your classes?