Do you have a student that likes to talk? Maybe they have a specific interest and they need to tell you about it? While this can be true for all kiddos, a child with Autism might have difficulty knowing when is an appropriate time to talk to you and when it's not appropriate. This stop sign is something we use to visually remind our students that it is not time to talk and tell them when they can talk.
This is just one version we use for students who can tell time. I also have others for students who are unable to tell time.