It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
to clarify what those using copyrighted works can do, and
to protect the rights of access to the public.
Using materials legally in an educational setting is easier than you think. Read more about using each type of material by clicking on the appropriate tab. Look at the tab on Fair Use to see what you can potentially use without obtaining permission (only applies to certain situations).
See guide to Creative Commons for an alternative approach to working with intellectual property with fewer restrictions.