Real-world examples and engaging activities guide readers in learning about measuring time with a calendar. Readers practice selecting appropriate measuring too

Explains how to keep track of the parts of the day with a clock; describes the development of the sundial, the hourglass, and the clock; and discusses minutes a

Travel through time with the maestros as they explore the amazing history of timekeeping! Did you know that there is more than one calendar? While the most comm

What is time? When did we first use it? Does it always work? How do animals tell time? A fun and fascinating look at time from the first calendars and clocks to