Images
Finding and using images online

Using Google Images:

Step 1: Enter search terms

Google Image Search

Step 2: In the results, select "Tools" and then "Usage rights."
Select a license to filter search results.
Google Image Search filtered by license

For more info, read Find images on Google that you can reuse

Free, copyright friendly image collections:
Images require attribution unless indicated with
NA
no attribution required


Creativity103

Discovery Education

Educational Technology Clearinghouse

EduPic

Find Icons

Flickr Commons NA

FlickrCC 

Freeimages

FreePhotoBank

Google LIFE Photo Archive

Iso Republic NA

Kaboompics NA

Library of Congress

Morgue File Must change the images in some way to reuse them

NASA JSC Digital Image Collection

New Old Stock NA

New York Public Library Digital Collections 
You can limit searches to just Public Domain images NA

Open Clip Art NA

Pexels NA

Photos for Class

The attribution is included on the image download

Pics4Learning

Pixabay NA

Re: splashed NA

School Clip Art

StockSnap NA

Unsplash NA

U.S. Fish and Wildlife Service

Wikimedia Commons

CameraPhoto Editors:

FotoFlexer

Pixlr

Attributions:

Camera image by Nemo is licensed under CC0 Public Domain