Science education textbooks co-edited by ASU’s Julie Luft. You may purchase these books from the NSTA store or click on the “contents” tab and print pdf files of all chapters for free.
Luft, J., Bell, R. L., & Gess-Newsome, J. (Eds.) (2008). Science as Inquiry in the Secondary Setting . VA: National Science Teachers Association Press. A NSTA best-seller despite the availability of a free edition.
Free STEM Educational Materials