Tell Me Why

XXIII: Time, Money & Measurement Answers questions such as "How did the calendar begin?" "What does the day have 24 hours?" "How did coins get their names?" "Who invented mathematics?" (Also Available in Spanish) Each video comes complete with its own printed Study Guide containing a glossary, additional questions and suggested learning strategies. Running time: 30 min. K645 $19.95 Spanish K6455 K645DVD $29.95