Dr. Michael Dee Piburn died June 22, 2020 after a brief illness. He was a professor of science education in the Mary Lou Fulton College of Education from 1989 until 2004, after which he was a program officer at the National Science Foundation. While at Arizona State University, Dr. Piburn served as Associate Dean for Research and Co-editor of the Journal in Research in Science Teaching, which was housed in the college. Dr. Piburn received his Ph.D. in geology from Princeton University in 1967, and his research at ASU on visualization in the Hidden Earth Project and on geoscience and science teacher education was founded on his science background. His most well-known work was the Reformed Teaching Observation Protocol (RTOP) to measure reformed practices in science teaching. In 2008, he was a Fulbright Fellow at the Technion, Israel, where he researched spatial visualization in science education. Earlier in his career, Dr. Piburn explored moral reasoning and propositional logic in the context of science education. He leaves behind his wife, Dr. Dale Baker, Emerita in the MLFC of Education, a son, daughter, and two grandchildren. There will be no service.