You taught me Linear Algebra back in 2013/2014 and I remember you were telling us about this amazing Japanese chalk you were using. To your credit it was quite

You taught me Linear Algebra back in 2013/2014 and I remember you were telling us about this amazing Japanese chalk you were using. To your credit it was quite good, and produced some really great writing. I wished my other math professors had your passion. Half the time I could barely see the writing on the board after the first erasing.