Changing expeclalions about Ihe quality of educalion occur in evel), sociely 01 IInexpecled r(l{e.rnIn this a5peCI, professional development programs for lutcher educalors have always beenrnessentially importanl where HDP is one. 11 was Ihe main objeclive oflhis sllldy 10 invesligole Ihernimpact of HDP on leacher educators' teaching performances al Gondar College oj' Teachers'rnEducalion. The study employed both qualitative and quanlilalive dala IIsing case sllldy lIIelhodrn. which was designed to answer the research queslions raised. The research parliciponls werernleacher educalors, HDL, HDTs, Department Heads, the VAD and sludenls. In order 10 colleclrndala Fom the parlicipants, questionnaires, interview, FGD, and classroo//1 ohservalion Iverernused employed. The dala obtained were analyzed and inlerpreled . The reslIlls o{lhe analysisrnshowed Ihat a considerable number nfleacher educalors have posilive alfillide 101l'ards Ihe HDPrntraining and they have been trying to be benefited Fom Ihe program. However, Ihe COlltpOnenlsrnof HDP were nol fully practiced yet as expected for a number of reasons. II was Ihen conellidedrnIhal Ihe prevailing praclice of the componenls of HDP was poor. In addilion 10 Ihis, Ihe Irend oj'rnusing Ihe lecture melhod Fequenlly and assessing sludenls based on examil'lOliol'ls as 11I1!i'C'rnmodes of teaching and assessment were emphasized al Ihe college. To overcolile litis, it I 'lISrnsuggesled thai Ihe actual context of the college and ils influence on Ihe leaching -teamingrnprocess should be given due attention.