This packet introduces students to three of the time tracking methods used by the ancient Mayans: the long count, the Tzolkin and the Haab calendars. Students learn to convert the long count to days and then learn how to convert the days into the Tzolkin and Haab "dates". Using calculators, students work through six problems and ultimately calculate the Mayan date for December 21, 2012, which is the end of the 13th cycle. This packet contains background and explanatory material, a teacher's