WPClipart is a collection of images for students and others that is free of copyright concerns as well as safe from inappropriate images. There are currently 50,526 images on the site. I can see students in grades K-12 using this resource. The site is easy to navigate and search for images. There are tons of categories such as medical images, geography images, historical figure images, computer images, and on and on which is why I see this being helpful to all students grades K-12 and all subjects. Unlike some clipart sites, there are images on this site that are not cartoon like making them better for older students. According to the terms and conditions, the site is Public Domain and the images can be used and edited. No direct user-uploaded images are allowed. The only concern I see is that this site is trying to get donations through PayPal which I haven't seen on other sites.

School Clip Art: a free educational clipart resource. After reviewing this resource, I see it being beneficial for elementary age students and teachers. Teachers can use the clip art in their presentations, worksheets, and lesson plans. In addition, students can use the clip art to complete their assignments. The images are easy to save for both Windows and Mac users. The clipart is free, teachers and students just have to reference the website in order to use it. There are many categories to pick from and navigating the site is very easy. The only challenge I see is that the clipart would not work well for students over 5th grade because of the cartoon like nature of the images.

EduPic Graphical Resource was created by a teacher and is a free image resource for educators and their students. There are over 6,000 different photos and illustrations to pick from. Most of the images seem to be geared toward middle and high school science and history classes; however, there are a few images for other subjects. A few examples of how I can see this resource being used would include a high school US History class studying Abraham Lincoln or washington monuments or a 7th grade Life Science class learning about biomes. The only downside I can see to this resource is that the main focus is on science and history so it would be limiting for certain subjects or grade levels.

Pics4Learning is a safe, free image library for education. Teachers and students can use the copyright-friendly photos & images for classrooms, multimedia projects, websites, videos, portfolios, or any projects in an educational setting. I can see Pics4Learning being used for all grades. There are pictures of animals which would be good for science classes, pictures of countries that could be beneficial to social studies classrooms, and pictures broken down by subject including math and reading. Students could use these pictures for any of their projects, videos, or portfolios. I can also see teachers getting ideas from the "education" section under popular collections. I do not foresee any problems or challenges with this site. The pictures are easy to download and the option to cite each image. You just select whether you are downloading for Windows, Mac, iPad, or Android.