History of and Information About the Metric System

The Unites States Metric Association, a non-profit organization founded in 1916, advocates completing the US conversion to the International System of Units, known by the symbol SI (ess-eye) and also called the metric system.  Whether or not you agree with and support this conversion, their site contains a lot of interesting information.  See the following links for a small sampling:

The United States Metric Association:


Origin of the Metric System:


Chronology of the Metric System:


USMA Link to National Metric Week Information and Ideas:


USMA Puzzles and Quizzes:


National Metric Day is October 10 (10/10, Get it?!)

The National Council of Teachers of Mathematics (NCTM) and the United States Metric Association (USMA) joined forces years ago to establish National Metric Week – the week containing October 10. This year, National Metric week begins on Monday, October 9. The day was established to recognize the value of the Metric System.

The history of the Metric System dates back to at least 1789. An interesting TED Ed Talk, “Why the Metric System Matters” by Matt Anticole, explains the history:


Did You Know That Babies Can Count?

On August 1, 2017, National Public Radio featured a piece titled We’re All Born With Mathematical Abilities (And Why That’s Important).  Read the edited interview to learn more about developing early number skills in preschool children, the value of being able to estimate quantities, the role of cardinality, and the importance of developing one-to-one correspondence.



Recommended Book for Adults


An enchanting and intriguing book about a brilliant math professor, his housekeeper, and her young son.

A short novel with messages that will stay with you for a long time.  Beautiful in many ways.

From Publishers Weekly:

Nov 17, 2008 – Ogawa (The Diving Pool) weaves a poignant tale of beauty, heart and sorrow in her exquisite new novel. Narrated by the Housekeeper, the characters are known only as the Professor and Root, the Housekeeper’s 10-year-old son, nicknamed by the Professor because the shape of his hair and head remind the Professor of the square root symbol. A brilliant mathematician, the Professor was seriously injured in a car accident and his short-term memory only lasts for 80 minutes. He can remember his theorems and favorite baseball players, but the Housekeeper must reintroduce herself every morning, sometimes several times a day. The Professor, who adores Root, is able to connect with the child through baseball, and the Housekeeper learns how to work with him through the memory lapses until they can come together on common ground, at least for 80 minutes. In this gorgeous tale, Ogawa lifts the window shade to allow readers to observe the characters for a short while, then closes the shade. Snyder—who also translated Pool—brings a delicate and precise hand to the translation.