Copyright Clearance Center (CCC)
The CCC is a licensing clearinghouse representing thousands of publishers and authors. The CCC can streamline the process of obtaining rights for the use of copyrighted materials when rights are required. In many cases teachers will not need to obtain rights, but there are times when they will.
Anyone can enter the CCC and check the cost of royalties based on a specific use. If an item is not listed, the CCC can contact the rightsholder for you.