What do the word “sis” and the sentence “Madam, I’m Adam” have in common? Both are palindromes–words, phrases, and sentences with individual letters that sit in the same sequence whether they are read forward or backward. With January being the month named after the ancient Roman god whose two faces allowed him to look into the past and into the future, it seems a fitting time to entertain and challenge students with the back-and-forth palindrome concept.