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Happy π Day!  If you are a numbers geek, you might already know when this day is celebrated. If you don’t, it’s on March 14, which has been designated as National Pi Day (made official by Congress on March 12, 2009).

Known for her hands-on teaching, Linli Chin grew up in Malaysia. While she enjoyed all subjects, from an early age she remembers the principles of chemistry, math, and physics coming easily to her.