- For example, you can tell a story about a student working on her homework before being interrupted when her parent calls her down for a snack. This is interrupted by a knock on the door. The answering of the door is interrupted by a phone call from a wrong number. What does the student do next after each interruption?
- "The story is explained through a diagram of the stack...As each activity is interrupted a reminder is placed on the stack. When any activity is finished they go to the stack to see what to do next."
![An analogy for stacks and interrupts A diagram illustrating the growth of the student's 'stack' of tasks following a variety of interruptions.](http://csteachingtips.org/images/Woollard1.png)