Photogen offers free images for commercial and personal use. There is no sign up or registration to download images. The images can be found through the direct search option or under the categories section on the homepage. It offers a wide range of categories of images. This site could be used for upper elementary, middle, and high school students in any content area. This site is easy to navigate and the images download in seconds. The only concern is that the homepage contains ads for other free image repositories that could confuse students and take them to another site. This issue could be fixed with having a 'teachable moment' students about internet advertising.

This image repository offers a wide variety of categories. The categories are listed at the top of the home page and are easy to navigate. Most of the photos offered are by amateurs free of charge. This repository requests that users give credit for images by providing a link. This could be best used with middle and high school students. It could also be a great source for middle school social studies students and teachers as the topics are organized by continents. Big Foto offers a great source of images that are neatly organized and easy to find.

This repository offers free images in the forms of: photos, backgrounds, and textures. The only request is that users give credit for the image used. The images are organized in galleries by topics such as, food or technology. This website is user-friendly and easy to navigate. There is sign up request to download images. This repository would be best used by middle and high school students for any content area. The only issue I encountered with this site is the advanced search option. I tried using specific key words (i.e sports) and only one image was found. I found that it was easier to browse through the galleries for more results. I could see this being a problem for those students who do not like taking the time to browse through the galleries.