Kerala School Teachers Association (KSTA) the largest and strongest movement has an important place in the history of Kerala. The movement raised slogans against imperialism and Feudalism during its period. KSTA fought severally to improve social status of teachers and against the unsympathetic attitudes of Private School Managements. The glorious campaigns and struggles conducted by KSTA to save and strengthen public education system in Kerala has a remarkable place in the trade union movement of Kerala.