Using a single message talker can be a great help in many situations, both at home or at school or other professional environment.  They are useful for people with communication problems as well as people who need reminders. 

Teachers can find these to be very useful in the classroom.  For students who easily lose focus, the teacher can record each step of the instruction once, and then the student can just press the button to remind themselves of the task at hand.  With a shortage of educational assistants in most schools, this can be a real benefit to teachers.

For teachers with students that have communication problems, a single message talker can act as the student's voice, allowing them to participate more fully in the classroom activities, and also to allow the student to make requests as required, ie. for help with a task,  bathroom breaks, or drawing attention to other needs.

The single message recorder can also be a real benefit for older people, especially with memory issues.   For someone with Alzheimer's, the recorder can be used as a memory aid for small tasks, or as a reminder for where things are.

This type of augmentative communication device is very inexpensive, so it's a great way to start someone off with communication aids.  It also becomes much easier on budgets.  Consider having several in different locations to meet different needs.