Write About is an online social writing tool that was created by educators for teachers and students. It provides incredible visuals that serve as inspirational prompts that students can write about. The posts can be public or shared with other users or groups of users in order to get positive feedback.
The freemium version provides basic features for up to 40 students, but each student can only write 5 posts. For $25 a year you can open it to unlimited posts.