The fair-use doctrine gives teachers unlimited protection from copyright liability,provided that they use copyrighted work exclusively for educational purposes.

Question

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In determining whether the fair-use doctrine provides a valid defense to a claim of copyright infringement,Section 107 of the Copyright Act requires that the court weigh the following four factors: the purpose and character of the use,the nature of the copyrighted work,the amount and substantiality of the portion used in relation to the copyrighted work as a whole,and the effect of the use on the potential market for or value of the copyrighted work.

The Fair-Use Doctrine Gives Teachers Unlimited Protection from Copyright Liability,provided