#9: Can I use Sky Lights in my classroom without your written permission?

If you’re an educator, you already have my permission. Sky Lights is an educational resource that can be freely used by teachers, whether in formal institutions, or in home schooling. Posts may be printed and distributed in a classroom as needed. They may not be altered, reproduced for sale, or converted into any other form for distribution over the internet or on digital media. Sky Lights sometimes uses photos or graphics credited to other individuals, but only after receiving written permission. These images may not be used elsewhere without securing equivalent permission. All photos from NASA, NOAA, and USGS are public domain, except where noted — your tax dollars at work.