This study explored the perception of teachers as members of trade unions on the effectiveness of their trade union; using Tanzania Teacher’s Union, as a case study. The study adopted a case study strategy where ten schools were involved in the study. Both qualitative and quantitative methods and approaches were used in data collection and analysis. A total sample of 209 respondents was involved in the study. Documentary review was also adopted, where various documents related to the study were critically reviewed. The results demonstrated that members of TTU have positive perception on the effectiveness of TTU as a workers’ representation and do represents its members. However respondents were skeptical on the issue of communication and keeping the members up to date on what is real going on within the union.