Start by doing your search in Google Images.
Once the images appear you’ll see a toolbox sign in the top right hand corner. Click on it.
A drop down box will appear click on Advanced Search.
At the bottom of the page the last option is Usage Rights. Click on the down arrow for the drop down box.
Pick the last option: Free to use, share, or modify, even commercially.
Then click the advanced search button.
I hope this helps.
Submitted by Louise Pelzl