Studies of error analysis on subjeots fromrndifferent languB.ge baokgrounds hp.ve shown thatrnthe appropriate use of prepositions mRrks one ofrnthe ma jor areas of diffioulty of students learningrnEnglish as a foreign language .rnIn this study, an attempt was made torndetermine the relative effeotiveness of thernstruotural I'I.nd the communioative aT1~roR()hes inrnteaohing the different oollooatio~l'I.l uses of thernnine most frequently used one-word prepositionsrnin English. A total of 120 grade nine studentsrnrandomly sampled f r om Yekatit 12 ComprehensivernSeoondary Sohool oomprised the population ofrnthe experiment. These were di vide c1. into fourrngroups . Groups I and II made up tbe Control andrnGroups III and IV the Experimental Grou!ls.rnA pretest was auministered to al l the fOllrrngroups to find out wh ether or not the subjeotsrnhad marked di fferences in thej.r leve: of rnasteryrnof the uses of the prepositions. A two-tRile1 trntest At a significance level of 0.05, nnd 120rndegrees of fr Eedom was performed onche level ofrncontrasting pairs and aggreg~te gr oups. ?indingsrnshowed no signifioant differenoes indic3.tingrnthat the s2111pled studcnts h"d more or lessrnequal knowledge of the uses of pr ep~sit ions.rnTwo sets of teaching lllPterials werernprepared along the lines of the principles ofrnthe structurl'!l and the communicative I'I.pPl'oachesrnfor the Control I