When was chalk made

A development much in the educational news lately is the electronic chalkboard. In place of a regular chalkboard, a teacher uses a large TV screen, inputting materials from a computer terminal. In a more advanced scenario, each student uses a terminal, to which the teacher sends information from a master computer. Experts claim that such set-ups are more visually exciting to students, more versatile than the old-fashioned chalkboards, cleaner than dusty chalk, easier for the teacher to use, and better able to present more complex material through the use of graphics and animation.

Many studies on the feasibility of electronic chalkboards have been made, however, and most seem to favor keeping the traditional chalkboard, at least for now. Electronic chalkboards that are sophisticated and easily readable lie beyond the budget constraints and technological capabilities of most schools. Further, studies of the electronic system's effectiveness report that teachers who use it spent more time preparing their lessons, teachers and students were less interactive, students were dissatisfied with the electronic chalkboards, and the new devices divided the students' attention between the screen and the teacher conveying the information.

Although the enthusiasm for electronic blackboards in some areas remains high, chalk use in the classroom is guaranteed for some time to come. Boynton, Robert. Chemistry and Technology of Lime and Limestone.

Cobb, Vicki. The Secret Life of School Supplies. Lippincott, Institution of Civil Engineers Staff, eds. American Society of Civil Engineers, Toth, Beth.

January, , p. Toggle navigation. Made How Volume 1 Chalk Chalk. Periodicals Toth, Beth. Other articles you might like:. Also read article about Chalk from Wikipedia. User Contributions: 1. Jacqueline Nyathi. This document was well documented and simple though relevant language used. It is very helpful to me and has enhanced my knowledge of chalk in particular, and limestone in general. This article is very interesting and good for those who r interested in learning and knowing the origin of things around them.

Am glad i was part of those who benefited from this article. Samantha Livermore. Using chalk for displays is common but with the goal of sustainability and Staying as close to home as possible San Fransisco I was wondering if there are any known chalk companys within the U.

It sounds a bit crazy, but be eliminating "made in china" our carbon foot print drops dramatically. This article has really helped me to understand the factors of making chalk, i very much liked the step-by-step orientation and looking forward to learn more in this website. Not Telling. Michael oluseto. The article is good and helpful. Sanford made their dry marker called EXPO in It was a bulky marker and available in black, red, blue, and green.

Later, Sanford added thin variants, less unpleasant odor and many more colors. Europe accepted whiteboard and dry markers in s. One story says that a whiteboard was invented by Martin Heit, a photographer and Korean War veteran while the other gives this honor to Albert Stallion who worked at American steel producer Alliance.

Then came dry marker and whiteboards started replacing blackboards because of allergies concerns and other potential health risks posed by chalk dust that was product of erasing blackboards. First whiteboards were made of enameled steel. Later were made cheaper variants of laminated chipboard, high pressure laminates and steel boards with a white synthetic polyester or acrylic coating.

These have a characteristic to leave residue of erased markings on. Those of highest quality are made of enamel and are called porcelain or even glass boards.

Blackboard Chalk and Whiteboard Pen - History and Future Blackboard chalk is a writing instrument used for writing and drawing primarily on blackboards but can be used on other surfaces too.

The porous sedimentary rock naturally deep under the sea where small circular calcite plates called coccoliths accumulate to form limestone.

In its natural form chalk can be found in colors ranging from white, grey, and yellow. The different colors occur due to various impurities in the chalk. Did you know that if you subject chalk to heat and pressure it can turn into marble. England has a lot of natural chalk deposits. Their cliffs are made from chalk, and can resist the weather much better than normal cliffs.