In recent years in Greece, the debate on the teachers’ assessment and the educational work has intensely started. The term "assessment of the educational work" and accordingly of the teachers was established in our country in the post-colonial period. The following questions particularly concerned both the educational community and the State in general: "How are the results of assessment used or how should they be used?", "Can all aspects of the work produced at school unit level and the effects of teachers on their students get objectively measured and evaluated?" The attempt to answer the above questions highlights a number of specific issues with various philosophical, political and pedagogical dimensions, concerning the purpose of the assessment, the bodies, the forms, the techniques and the criteria. For the first time in 2012, the teachers’ assessment was implemented in the Model Experimental Schools. There were no previous relevant researches that captured teachers' views on their assessment. This gap was attempted to be filled through the present research. During its development, the questionnaire was formulated based on the analysis of the institutional framework. It was distributed to the entire population of Secondary Education teachers in Greece who serve in the Model Experimental Schools. This particular publication focuses on the presentation of suggestions from teachers on how teacher assessment could be more effective.