Dewey's chief reason for this recommendation is found inhis psychology of learning. "An occupation is a continuousactivity having a purpose. Education through occupations con-sequently combines within itself more of the factors condu-cive to learning than any other method. It calls instincts andhabits into play; it is a foe to passive receptivity. It has anend in view; results are to be accomplished. Hence it appealsto thought; it demands that an idea of an end be steadilymaintained, so that activity must be progressive, leadingfrom one stage to another; observation and ingenuity are re-quired at each stage to overcome obstacles and to discoverand readjust means of execution.