Experimental teaching study group 4 with four graduated teaching content as required when testing for all four methods provide different results by rank within each group as shown in the table.
The experimental method to teach four classes I teach four groups when finishing fourth to the content you want to test a different or no effect on the scores for each group are shown in the table.
In the experimental teaching 4 method with the younger students 4 group when teaching content according to the 4 end test method to test or by different score each group as shown in the table.