Accessibility: In many developing countries, chalkboards far outnumber whiteboards because they are easier to access. ... They are very popular in education segments because the running cost of chalkboards is much less expensive compared to markerboards or glass boards. Chalk is also less expensive than markers.”

Why do mathematicians use chalkboards?

It is probably the overwhelming opinion that in mathematics, blackboards are the best tool to develop a thought to a class. They always work and they slow down the speaker enough to get the ideas across clearly. Powerpoint needs lots of restraint in order to be used effectively.

Why do schools not use blackboards anymore?

Chalkboards use chalk as its writing utensil, but since chalk is made of compressed dust it can be harmful to students with dust allergies. ... While the chalkboard still remains a part of most American classrooms, school designers no longer use chalkboards in their new school designs.