I'm so sorry to hear of Walter Koetke's passing. Walter was the person who revealed to me the possibilities of educational technology. At his two-week summer workshop in 1980 he taught a group of teachers BASIC computer programming and introduced us to educational software. All through the course he eschewed jargon and left us with not only a strong foundation in programming but also a lasting lesson: it is possible to discuss technology and still use the English language.
Walter served as head of technology services for our district, so once the workshop ended he was available to answer questions and give encouragement. A good number of my students, I believe, will always remember his excellent "Survival Math" educational software series that promoted abstract thinking in addition to bolstering mathematical knowledge. Walter was an educational visionary as well. Addressing a group of educators just after the now famous "Nation at Risk" report was issued, Walter imparted to us that sense of urgency that has since fueled the educational reform movement. I will miss him.