Is it true that every tenured university professor has published a textbook?

cause I typed my professors' names on a textbook search and they didn't come up.





I thought in order to get tenured, they are required to publish a textbook?Is it true that every tenured university professor has published a textbook?
No, that's not true. If that were the case, every single professor would be using the textbook they wrote, and there would be millions of textbooks out there in every field - that's not necessary or feasible. To become tenured at most colleges and definitely all universities, they expect professors to have published - but journal articles, not books. Very few will publish books, and actually articles are more highly regarded even if they take less time to write and publish because they present original work (not just rehashing the field) and are peer-reviewed. I'm sure if you looked up journal articles by your professors in their field, you'd get a lot more hits.Is it true that every tenured university professor has published a textbook?
No. Most tenured professors have done something research related which may be published but few write books.