The Effect of Using Substitution Drill on Students ' Tenses Mastery

the use of single slot substitution drills single slot substitution drill of the structural class may be sufficient A mechanical drill is defined as a drill where there is single slot shelving Substitution drill may be of various types according to the mechanism of operation and they are: a Simple substitutionSingle slot substitution

single deck blackjack slot Single Slot Substitution : This type of drill requires both class and indi- vidual student response As such , it is a good way for the teacher