HagoromoFulltouch 10-Color Mix Chalk 12pcs - (White, Red, Yellow, Blue, Green, Brown, Purple, Orange, Vermillion Red, Yellow Green) 12 Pieces x 3 Boxes (36 pcs Total) - Imported from Japan

I teach in a lower income level school, and this chalk writes better than any other. It’s smooth, and it cleans well. Before I bought this chalk, I was using regular chalk, and the kids could wipe it off so easily that I stopped using the chalkboard. Then I tried chalk markers, but it wouldn’t come off the board. I had to repaint the chalkboards. This chalk quickly became my favorite, and I recommend it to all of my teacher friends.

Highest pigment chalk in a low cost product. I have tried them all. This is the best choice i’ve found. Using on old school slate blackboards.