Citation information of embedded images

I recently taught a group of eighth graders to use Prezi and they LOVE it for their class presentations. However, now that they have the basics down I need to teach them to cite their sources…including images. I searched the community and I am really discouraged by the answers I have seen from Prezi employees, who seem to be saying that since the built in google image search looks for creative commons images, we do not need to worry about citations. This is UNTRUE. You must still give credit to the creator of cc images. So while the built in image search is AWESOME, please, please, please, improve your product by including the citation information with image results. I hope to be able to share with my students that this is something that is in the works. Thank you!