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Tomorrow is Pi Day.  “Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159.  Pi has been calculated to over one trillion digits beyond its decimal point. As an irrational and transcendental number, it will continue infinitely without repetition or pattern. While only a handful of digits are needed for typical calculations, Pi’s infinite nature makes it a fun challenge to memorize, and to computationally calculate more and more digits.” (http://www.piday.org/)
So, tomorrow let’s celebrate all the constants in our lives, those things that don’t change, that we can solidly and reliably base our lives on.  Celebrate by making a square pie, or by eating a piece of pie.  Look for pi in nature, on jerseys, or in newspaper articles.  Play pi as a musical sequence.  Read about Einstein, who was born on 3/14.  Send a thank you note to someone you love.  How about reading a book about Pi?
Navigating Early, by Clare Vanderpool, is about two boys, Jack and Early, who set out on the Appalachian Trail in order to find Early’s lost brother, who never came back from the war.  Early weaves all their many adventures into his ongoing story about Pi.  This story is beautifully and vividly told.  I enjoyed it very much.