The purpose of thi s study was to investi gate students' coll ab oration and dominance in smallrngroup tasks. The stu dy was conduc ted in Dagmawi Min ilik Preparatory sch ool in Addi s Ababa inrnthe acad e mic year 20 I 011 1 grade 1126 was in focus and tw o small groups in th e sect ion wererntaken as s ubj ects for the study.rnThree data gathering in s truments, observation as a principal tool, student's di ary and teacher'srninterview, as supportive too ls were used to co ll ect the data, seekin g for an in-depth data tworngro ups .in the section were observed six times i.e. three times eac h, continuously with the hel p ofrnaudio record er and observat ion checkli st. The checkli st contained di fferent activities like thernextent and patterns of learn e rs ' collaboration and ind ividual dominance in s mall group tasks . Inrnorder to get addi ti onal data and see kin g for some clarifi cat ion on th e ob se rved phenomenon, therntwo groups of par ti cipants i. e . ten st udents were reques ted to de velop the ir own diary in Engli shrnle sso n pe riod and [our teac hers using avai lab le samp lin g tec hniques were int e rvi ewe d. In order tornanalyze th e data gathered from th ose in st rument s desc ripti ve re search method was employed.rnResult s of the data analy sis show th at students were le arning co ll aborat ive ly in all English peri od.rnConsequently, the extents of learners ' collaboration in th e clas sroom were very high and werernstud en t-student patterns of interaction. During learners interaction in small groups the extents ofrnindividuals' dominance were ve ry high. The cla ss room dire ct observation, the student's diary andrnth e teac hers in te rvi ew revealed th at, a s far as learners come up with different characteri sti cs,rnexper ience, background and pe rso nal it y, in dividua ls' do min ance in small gro up s were persistent .rnDo minance related to acade mi c compet iti veness, perso nalit y and procedure were th e majorrnpatt erns of dominance.