Most courses have an attached course file bundle that will include all the necessary practice files used in the projects.  To download the part files, follow these steps:

1. Launch the course from your Learning Path or Course Library.
2. Click on the download course files icon in the course tool bar.
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3. Extract the files to your local computer and continue with the course.

If you have issues downloading the part files, be sure to check that you don't have any pop-up blockers turned on (check the settings in your browser tool bars to you may have installed.)