A large number of thesis and dissertatiolls are published each year in Ethiopia. But there is still arnshortage of studies that show the issue of lesson plan assumption that asserts studellts' activernillvolvemellt ill plOllllillg a lessoll. Sillce the begillllillg of modern ellucatioll, lesson plan preparatiollrnhas beell so 10llely left for teachers. However, the lIature of educatioll shows that teachillg alllirnleamillg are complimelltary activities just as ill the case of Positive alld Negative polarities ofrnElectricity or North alUl South poles of Maglletism The school system, despite this fact, remaillsrnauthoritative agaillst studellts' active illvolvement ill plallllillg their lessoll particularly those recruits atrncolleges alld ulliversities who are the-would be teachers. In plaill lallguage, the study is illterested illrnillvestigatillg how students allli teachers could be actively illvolved ill plallllillg a lessoll. Thernparticipallts of the study are teacher educators allli teacher trainees at Aysaita College. Participantsrnwere taught llOw to plall their lessoll before commencemellt of regular classes by devotillg all extrarntime. Primarily, the study adopted qualitative design allli supplemelltell by qualltitative data as well.rnData collection illstrumellts comprised: illterview with individual teachers; admillisterillgrnquestiollnaire to studellts as well as teacher educators; observatiolls alld library attendallces.rnQualltitative data were gathered from 37teacher trainees alld 20 teacher educators allli allalyzed usillgrnpaired sampled t test and simple percelltage respectively.rnThe major findillgs of the study revealed that studellfs illvolved ill plallllillg a lesson were familiar withrnthe topic, objectives, types of methods, aids, assessments employed alld references from where studemsrncan make readillgs and notes. III tum, this led students to present, discuss, and argue their lIotesrnactively, cOllsolidate their Il/Illerstanding alld cOllstruct their kllowledge durillg the implemelltatiollrnprocess. This study is cOllceived ill the hope of promotillg 011 active teachillg alld leamillg ill AysaitarnTeachers College. The topic is almost virgill, alld the lIeed for further researches alollg this topic isrnacute.