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.
TEACH THE PUPILS HOW TO TELL THE TIME.
First,—Teach the pupils to count to sixty.
Develop the idea of, and teach the pupils to write the Roman and Arabic numbers to twelve inclusive.