How do students decorate the bathroom stall doors in speak novel?

You're likely thinking of the novel "Speak" by Laurie Halse Anderson. The bathroom stall doors in the novel are not decorated.

Instead, they are used as a space for students to express their pain, anger, and frustrations through writing and drawings. The main character, Melinda, finds solace in leaving messages on the stall doors, which she sees as a way to communicate her feelings without directly confronting anyone.

The messages on the stall doors are often dark, disturbing, and even violent. They reflect the harsh realities of high school life, bullying, and the trauma Melinda is dealing with.

The bathroom stalls in "Speak" are not a place of fun or frivolous decoration. They are a space for raw, unfiltered expression, which is ultimately what the novel is all about.