Teachers are sharing their lessons and materials online through curriculum marketplaces such as Teachers Pay Teachers. In this pursuit, finding quality images is always a challenge, especially images that you have the rights to use for selling or sharing online.
Happily I would like to share with you Pixbay. This website provides thousands of quality images free to use that does not require any attribution. This means no concerns about copyright, selling content, or other legal matters. Find the image, download, add it your curriculum, and make beautiful lessons and worksheets for your students and other teachers. I use this resource all the time. Love it!