Image Library

The images at the sites below are generally considered free to use.  
You should always double check before you use an image, as sometimes terms can change, and you should always cite your source.

General

Photos for Class

Pexels
Unsplash
*new* Creative Commons Search

Ancient Civilizations
EduPics 

Animals
NOAA's Ark
Open Image Bank: Animals
Pics4Learning: Animals

Food and Drink
Picdrome: Food and Drink
Open Image Bank: Food
Pics4Learning: Food

Landscapes
America's Coastlines
Small World

Nature
Picdrome
Open Image Bank: Flowers
Pics4Learning: Flowers

People
Life Archives

Space
NOAA in Space
Earth Science World Image Bank
NASA Image of the Day

Sports
Picdrome: Sports & Recreation
Pics4Learning: Sports and Leisure

Weather
NOAA Photo Library: Weather Wonders
NOAA Photo Library: Severe Storms