Choose a software package you know well, such as Windows, one of the Microsoft Office applications, or a web browser. For the package you select, show that you understand the four skill levels introduced in the chapter by providing two examples of the following:

1. The definition of an important concept or vocabulary term.

2. An explanation of the concept or vocabulary term that aids in understanding it.

3. A skill or task related to the concept that a user should be able to perform at a basic level.

4. A measure of expertise that a highly skilled user would be expected to perform.

Finally, explain how you could measure whether a trainee has acquired the level of expertise you described in #4 above.