Yeah, in my area many public schools still use it to write note on chalk board for their students. I produced this chalk by myself where many head of schools order for it. Its very easy to clean up from blackboard unlike maker where many people find it difficult to differentiate parmenent one from ordinary.

Pack is selling at the rate of 2,200 naira which is equivalent to 10 steem. Some people prefer chalks because it last longer and also affordable for everyone.