Final answer:
Portfolios often contain resumes, letters of recommendation, and performances as examples of one's professional skills.
Explanation:
Professional materials typically found in a portfolio include:
- Resume: A summary of professional background
- Letters of recommendation: Endorsements from individuals who can vouch for your skills
- Performances: Samples of your work, such as projects, artwork, or other professional examples
Learn more about Portfolios and professional materials here:
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