The purpose of this research was to identify the effect of application of the theory of consistency of content on teaching the skill of diving shot in handball for prep school girls. The researcher used the experimental method of three experimental groups and the research people were intentionally selected and were girls in the 2nd prep grade at Al-Ahramat School, Giza. They consisted of (5) classrooms including (75) girls in 2012/2013 school year and (3) classrooms were randomly selected as three experimental groups that the 1st experimental group was subjected to regular teaching, the 2nd experimental group was subjected to random teaching and the 3rd experimental group was taught by merging the regular and random methods. Thirty girls remained from the research people were used for pilot studies. As a research tool, the theory of internal consistency in education was used to study the best method of teaching motor skills and how fast and precisely gained with its two branches viz. low internal consistency known as regular teaching aiming at following logic repetitive gradual sequence, high internal consistency known as random teaching aiming at following a sequential transitional method irregularly during teaching motor skills and the merged method combining the regular and random methods.
The researcher concluded that in the first phase of acquisition and retention, the differences were in favor of the group that has been subjected to the merged method followed by the group taught regularly and then the group taught randomly and in the second phase of transiting, thinking and remembering, differences were in favor of the group that has been taught by merging method followed by the group subjected to the random method then the group taught regularly and all results were statistically significant.