Feb 22, 2018 - 01:49 PM
Pics4Learning was built to "provide copyright friendly images for use by students and teachers in an educational setting." So even though you work in education, you are technically a for-profit, commercial consultant working in the educational industry.
The contributors to Pics4Learning still retain copyright and have granted permission for educational use, and have not released the images into the public domain. So if you have an image you really want to use, you can reach out to firstname.lastname@example.org and ask us to forward your request to the photographers.
Commercial entities do this quite often. Depending on the usage of the image, many contributers grant additional use rights for no compensation.