Teacher: "Take your ruler and lay it across your paper from the left-back corner to the right-front corner.—Margaret, what are you to do?"
Margaret: "I am to lay my ruler on my paper from the left-back corner to the right-front corner."
Teacher: "Draw a line connecting the left-back corner of your paper with the right-front corner.—James, what did you draw?"
James: "I drew a line connecting the left-back corner of my paper with the right-front corner."
Teacher: "Alice, what have you drawn?"
Alice: "I have drawn a line connecting the left-back corner of my paper with the right-front corner."
Now have the children draw a line connecting the reverse diagonal corners and proceed as follows:
Teacher: "Find the point where the lines cross. This is the center or middle point of your paper.—Albert, what are you to find?"
Albert: "I am to find the point where the lines cross, which is the center of my paper."
Teacher: "Measure one inch from this point on each of the four lines and place a dot.—Sara, what did you measure?"