In Canada, it's against the law to make copies of, upload or download copright-protected works like movies, TV shows or music without permission from the copyright owner. The websites listed here tell you where you can go to get music, movies and other media legally.
Creative Commons
Compfight - Compfight lets you search the image hosting service Flickr for photos with Creative Commons licenses.
Make sure you select “Creative Commons” and “Safe”on the left side of the page before putting in your search term.
Pixabay - Thousands of high-resolution public domain images searchable by keyword or browseable by category.
ClipArt for Google Docs - 4 ways to responsibly integrate clipart into your Google docs
Clip Art - Free to Use / School Friendly
Sound Effects
Free Sound - The Freesound Project is a collaborative database of Creative Commons licensed sounds.
Free SFX - Free sound effects and music for multimedia projects.
SoundJay - Free sound effects for use in projects.
SoundGator - Free, downloadable recordings of common sounds like doorbells, dogs barking, car horns honking, etc. Browse 23 categories of sound.