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The blackboard clock

Chapter 3: HOW TO MAKE THE BLACKBOARD CLOCK.
By Eva Aldrich
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How To ...Teaching & Education

About This Book

This manual gives teachers step-by-step instructions for constructing a large blackboard clock, including materials and fastening options for the hour and minute hands. It outlines sequential lessons to teach time, beginning with counting to sixty and writing numbers to twelve and developing the concept of minutes and hours. The text explains the distinct roles of the minute and hour hands and demonstrates methods for teaching o'clock, half past, quarter hours, and minutes past or to. It supplies classroom exercises and drills—individual practice, teacher-directed placement of hands, and timing activities—to build accuracy and classroom decorum. It also recommends rhythmic movement drills and summarizes basic time relations such as seconds, minutes, hours, days, and weeks.

Nature is the only Perfect Teacher. He alone succeeds in the art who follows Her precepts.

HOW TO MAKE THE BLACKBOARD CLOCK.

Draw a circle, about a foot in diameter, on the blackboard, in a convenient place where it may remain. Place a dot in the center. Inside the circle place the figures, hour and minute marks as you have them on the face of your watch or clock.

If the clock is to be made on a wooden blackboard it will be best to have slips cut from tin for the hour and minute hands, and fastened to the center of the face with a slender screw; but if the board is of hard finish, and a screw of any kind will not answer, the next best plan will be to cut the hands from hard, white pasteboard and fasten them in place by means of a long pin, using a hard piece of pasteboard, cut round, for a washer.

Exercise care to have the minute hand long enough to reach exactly to the minute spaces, and the hour hand to the hour figures only.

The clock is thus made ready for use, though it will be made more attractive by drawing lines representing a case about the face in colored crayon. A smooth board having the dimensions of twelve by twenty inches, or thereabout, may be painted and prepared to represent a clock.

An old clock with a worn out movement answers still better for the purpose than the blackboard clock.