Who Invented Chalk?

If you want to know who invented chalk, the answer is no one. Chalk is a naturally occurring mineral composed of calcite, and is a form of limestone, so no one invented it.

Soft Rock

Chalk is porous, soft, and can be white, grey, or yellow. It is found where seawater was once present, because it is composed of sea creatures which became fossilized over the years. It can be found in abundance all over the world.

Who Invented Chalk

No one invented chalk, but a lot of people invented uses for it. It can be used to write on blackboards or sidewalks or mark lines on an athletic field. It can raise the alkaline levels of soil that is acidic, thus helping agriculture. Chalk can remove sweat from your hands and keep them from slipping when you are engaging in certain sports and activities, such as rock climbing or gymnastics. It is also used by tailors to mark cloth. Chalk is slightly abrasive so it is even an ingredient in some tooth pastes and can be helpful in polishing metals.    

Chalkboards

If you want to know who invented chalk, you also might want to know who invented chalkboards. Prior to the 1800s, teachers had no way of presenting information to the class as a whole. Since there were no copying machines either, this made teaching difficult. Because pencils and paper were often not available, students did their work on individual slate boards. The teacher had to walk around and check everyone’s work. James Pillans, a geography teacher in Edinburgh, Scotland, invented the blackboard and chalk.

The first American teacher to use a large chalkboard was George Baron, who taught at West Point Military Academy. He started using it to teach math in 1801.  Chalkboards caught on quickly across America, because a teacher could instruct larger numbers of students more efficiently. For 200 years, chalkboards were the major educational tools in businesses and schools.

In the 1960s, blackboards were replaced with steel boards, coated with green porcelain enamel. These were good because there was not as much contrast between the writing and the board, so it was easier on the eyes, and the residual powder, left after erasing, was less obvious. Since the boards were not black anymore, people started calling them chalkboards.

Whiteboards made their appearance in the middle of the 1980s. They are also called dry erase boards or marker boards. So instead of chalk, many schools now buy dry erase markers. By the end of the 1990s, 21 percent of all schools in the U.S. had changed from chalkboards to whiteboards.

Chalkboards to Whiteboards

In a discussion of who invented chalk, it is interesting to note that the chalk being used today is not actually made of chalk, but is made of gypsum (calcium sulfate). In using chalkboards, dust from the chalk is a concern. Certain people have allergies to dust, and this concern prompted the invention of dust-free chalk. With more and more computers in classrooms, chalk dust could potentially cause damage to them. This has shown not to be a problem, as the computers are usually not in direct contact with the chalkboard.

The chalkboards of today are stronger and more durable than the old “slate” boards.  Since they come in different sizes, they can be mounted on the wall, or carried by hand. They continue to be valuable tools in teaching and business. 

Many educators feel the resistance of the surface of chalkboards is better than whiteboards, whose surface is slippery, in that it helps young children in their handwriting. Chalk is not toxic, is cheaper than whiteboard markers, and washes off of clothes and skin easier than markers. Chalkboards also don’t require cleaners with chemicals in them. They can be washed with simple water.