Use PEZ ® dispensers to demonstrate the push, pop, and peek methods for stacks to provide a clear and accessible illustration of these methods.

The following activities demonstrate these three stack methods:

The push method is like putting another candy into the dispenser.
The pop method is like removing a candy from the dispenser.
The peek method is like opening the dispenser but not removing the candy.

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Ria Galanos from the 2010 AP CS Toy Night

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Other Tips By Ria Galanos