Very soon, I will celebrate my 25th teaching anniversary. This got me thinking about the beginning of my career, what was different then, what is still rather similar and especially how differently (or similarly) I used to teach. How have all these years influenced and shaped the way I teach today? To answer these questions I can rely on my memory and perceptions, as well as those of my students and of those who observed me. It’d be great, and probably enlightening, if I could compare the past...