Icon request: teacher/chalkboard/seminar
I'm trying to pick an icon to represent my community's seminars. I've grown really quite attached to the duotone Phosphoricons, so it's a shame that there's nothing education-based in there, not even a graduation cap. In the meantime I'm using `puzzle-piece`.

FontAwesome has both a chalkboard and a chalkboard+teacher:

<p align="center"><img width="300" src="https://user-images.githubusercontent.com/29130152/100845660-7e513000-3475-11eb-8188-1e635244ab0a.png"></p>

Many thanks, and thanks to the both of you for this very useful project. 