Formal examinations hashave been considered as athe best testing method ever to identifyassess students levels at school for decades in developed countries .
.... you have some grammar errors here. Need to work on that! .... Also, why only in developed countries? Even in the third world countries, majority schools examinations to assess their students' level of competence!
However, course work and dissertations which are much more applied in university dynamics in Western countries are demeaned worse in some old point of views .
... This sentence has issues. Better re-phrase it.
n the first place, it is often argued that conventional tests conducting at each semester at school are very clear and require student'swell- preparation, which exactly assess the student's ability.
.... this sentence is too long and crowded with too many words and ideas. Have short and simple sentences that effectively deliver your ideas.