Bill W. Tillery, 78, passed away on October 31, 2016. Bill earned a Bachelor’s Degree from Northeastern State University in 1960 and Master’s and Doctorate degrees from the University of Northern Colorado in 1967. Bill was a full professor at ASU where he taught in the Department of Physics and Astronomy from 1973 until his retirement in 2006. After retirement Bill was awarded Professor Emeritus status and remained a part of the ASU Faculty. Before moving to ASU, he served as Director of the Science and Mathematics Teaching Center at the University of Wyoming (1969-73) and as an assistant professor at Florida State University (1967-69). Bill has served on numerous councils, boards, and committees and was honored as the "Outstanding University Educator" at UW in 1972. He was elected the "Outstanding Teacher" in the Department of Physics and Astronomy at ASU in 1995. During his time at ASU, Bill taught a variety of courses related to physics and received many grants for science curriculum development and science teacher inservice training. He developed science pedagogy which contributed to his well-known work with local middle and high school teachers. Some of this work included resources such as SERP (Science Education Resource Page) at ASU,  AEE Newsletter (Arizona Energy Education) in conjunction with APS and founding and directing a teacher training program for graduate credit called Portal School where area teachers were trained at the university to teach teachers in their own school districts science education techniques, lessons and activities. Bill authored or co-authored more than 60 textbooks, many monographs and served as editor of newsletters and journals. He leaves behind his wife, Patricia, their daughter and two daughters from his first marriage.