Copyright is an important aspect of our society. It was written to protect people and the projects they create, ensuring that the creators are compensated for and maintain control over their own work. This copyright is in place as soon as the work is created.
This also means that you need to respect the copyright of the work of others. This is true even when using material for 'educational purposes'. Be sure to check the licensing and use only allowable content. If you want to use copyrighted material, you must obtain permission from the material owner. For more suggestions on respecting copyright, check out this article:
"Teaching Students to Legally Use Images Online" by Jennifer Gonzales.
Use the menu options on the left to find copyright-friendly material as well as programs you can use to create.
This supports the AASL Standard III, B: Collaborate, Create and Standard V, C: Explore, Share