Time & Measurement

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  1. About Time

    About Time - A First Look at Time and Clocks

    The earliest people divided time into two intervals, nighttime and daytime. Today’s atomic clocks divide time into picoseconds—trillionths of a second! How did we get from there to here? Paperback, 32 pages. Learn More
    $6.95
    EM30
    In Stock
  2. The Story of Clocks and Calendars

    The Story of Clocks and Calendars - Award-winning history book

    Children will journey through time and across civilizations to learn how human beings have relied on calendars to tell us when to plant, harvest, and rest. Indexed, with cultural, science, and history references. Paperback, 48 pages. Learn More
    $9.95
    EM33
    In Stock
  3. Maria Montessori Centenary Card Set

    Maria Montessori Centenary Card Set - A 100 year historical retrospective

    Ten picture/story cards celebrate Montessori’s life and work in beautifully reproduced photographs in collaboration with AMI/USA. Place and date labels; short related facts. Learn More
  4. Simple Stopwatch

    Simple Stopwatch - From Learning Resources

    A functional, uncomplicated timepiece the youngest child can operate independently: 1 green “go” button, 1 red “stop” button, and 1 yellow “clear” button. Very easy to use. Rugged, plastic housing; breakaway cord. Learn More
    $9.95
    SC36
    In Stock
  5. Wind-Up Tape Measure

    Wind-Up Tape Measure - 10 meter (33 feet) long tape

    This well-made, flexible coated fiberglass tape has heat-sealed markings: inches on one side and centimeters on the other. Just pull on the tape to extend it, then wind it back up. Plastic casing, metal crank. 33 ft. Learn More
    $12.95
    V69
    In Stock

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