Abstract
Although many electric products have spread,it is thougt that these are very difficult to master for a senior.Task decmposition plan is menthioned as a method of solving difficulty.In order to measure the effect,the experiment to which I have the mail transmission which used the cellular phone carried out was conducted on the senior.which is not taught as the group which taught the subject division plan,the subject was carried out,and the degree of subject achievement was measured.The group which taught the subject division plan as result was better in the result.Thereby,it can be said that it was about the effect of Task decompositions plans.Moreover,it turns out that the part in which the mistake was made as cause of the senior who cannot carry outsubject achivement is not noticed.
