Whether you loved school or hated it, chances are good that you had a teacher you loved. Someone who helped you understand a tough topic, introduced you to a great book, took a special interest in you ...

Come spring, everyone's a joker about math. That's because every March 14 — 3.14, that is — is Pi Day, so named for the set of numerals that make up its date. Sure, pi is technically the ratio of the ...