Cohorts and Others of Ill Repute

Today in generational change questions from Youngest: Did you have chalk boards in primary school?

Me: there were blackboards all through my university years*. Except the lectures in the Octagon--the CS lecturer used an overhead projector, but I actually don't remember if the psych lecturer(s) used any visual aids or not.

Youngest: when did that change?

Me: buggered if I know.

* a moving target, I know. This was my 1990s university years, not my 2000s university years (might have been white boards?), my 2010s university years (everything 100% online, almost no lectures), or my 2020s university years (in which all talks attended have powerpoint (generic) slides or nothing).