Yes abacus still in used today, specially for visual impaired students. Eventhough the talking calculator did help for visual impaired students at Braille schools across the nation, but talking calculator do not let students understand the important of number placement value. I enclosed some websites talk about the benefits of using abacus in Braille schools:
http://www.hadley-school.org/resources_list_detail.asp?resource=abacus http://www.hadley-school.org/resources_list_detail.asp?resource=abacus
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The abacus was invented by the ancient Chinese people and was used to perform mostly mathematical calculations. In Japan, even to this day, the abacus is still used for simple calculations. Many people consider the abacus the first "computer" or at least the first calculator.
the abacus as we know today appeared circa 1200 A.D. in
An abacus is a counting board or an ancient version of a calculator. Its first recorded use is by the ancient Sumerians in about 2500 BC. From that time on it seemed that all the ancient cultures used an abacus in some form or another. It is still used in parts of Asia and Africa today. The word itself is from the old Middle English which in turn took it from the Latin.
Yes teepees are still used today by uncommon are unknown idians.
random people who needed it for counting and other uses of math they couldn't do in their head. It is still used to day all around the world in different countries