I taught college courses for 15 years. I wasn't what you would call a professor, we didn't really have those at our school. I was an adjunct faculty member, which is a fancy word for part-time teacher... although for a stretch there I taught full-time during which period I also completed a masters degree in education. My subjects were usually technical in nature: website development, programming, web design, although I also taught some drawing & illustration courses along the way (I bounced around in college majors as both a student and a teacher).
Let me address directly the question of knowledge and doubt. Many Latter-day Saints (including many who have grown up in the church) are now re-examining their faith and are questioning whether or not they really believe the claims of the church to be true. In our information age we have a world of knowledge quite literally at our fingertips, and that has changed the landscape dramatically.