**Lightboard**

I build a [lightboard][1] at home last summer in order to give my classes
(this was inspired by Ivo Vekemans - here's an example of [him lecturing][2]).
I recorded three whole classes so far, and a bunch of seminar talks. Here's [a talk of mine][3]. Overall, I'm very happy with the setup.

*Advantage:* The result is really beautiful to watch.

*Disadvantages:* The lightboard + recording equipment uses up a whole room in my house. Also, it's a bit time-consuming to clean the board (if you don't clean it well, it leaves lots of shiny smudges). This makes it essentially impossible to give live talks on it.

This [youtube video][4] discusses types of markers for lightboards, including how they erase. (Btw, to erase, just use a dry cotton cloth – certainly no window-cleaning products.)


  [1]: https://www.youtube.com/watch?v=FYwXOLU4TKk&t=199s
  [2]: https://www.youtube.com/watch?v=u9v5VTDwiPg&list=PLHYBb0FtzAK_Bz0lvcNAnu98hcmaXr0gF
  [3]: http://andreghenriques.com/OSUseminar2020.mp4
  [4]: https://www.youtube.com/watch?v=CUf_r0h5gXg