The purpose of the study was to examines the challenges of teaching methodology in Tanzania secondary schools, bear in the mind that recently the ministry of education science and technology presenting the 2022/23 budget of financial year outlining several measures to reform the education sector, including review of the 2014 national education and training policy and curriculum, minister for the portfolio, prof Adolph mkenda insists that the current education policy needs through review in a number of areas and also to improving the number of teachers, teaching tools and infrastructures. Therefore this study investigate those challenges which hinder the teaching in secondary school as we know that despite efforts to expand access and enhance equality at all levels of education, Tanzania still faces a major crisis in its attempt to enhance the quality of its education system. This study adopted documentary review method to examine the challenges which facing teaching methodology in secondary school. A number of articles, Thesis journals and reports from database, conferences proceedings, and selected electronic journals were reviewed. However Teaching is one of the most well-known professions in the world. This is due to the importance in the care of children and adults. Therefore to become a teacher one must fulfil the following requirements such as must receive a defined level of education and must undergo a course of training as a teacher from a recognized institution that uses an approval curriculum and also adhere to teachers’ professional code of conduct. Hence in additional to that a teacher should recognize that teaching is an occupation and more than mere gainful employment. He or she therefore, undertake to conduct himself or herself according to the following rule that to follow at all time the highest standard of professional conduct, to set a good example in his or her conduct and his or her person at all time to the children under his or her care