"The article identifies characteristics and consequences of competition between two teachers' unions as a component of multi-unionism. The study aimed to clarify the consequences of this competition for the education system following the splitting of one teachers' union and formation of a new union, which challenged both its rival and the policy-makers. The study focuses particularly on the development of the newer union. Data was gathered from documents written between 1958 and 2013, and supplementary interviews were conducted with 15 key figures in the unions, the Ministry of Education, and the Treasury. While research literature usually describes the conduct of teachers' unions on a continuum between hindrance and facilitation of educational reforms, the study's findings add an additional dimension relating to the possibility that competition between two teachers' unions can engender competitive proposals for educational reform and act as a catalyst for change in educational policy. The rivalry led to the emergence of two similar, but competing, educational reforms, accepted by government and in effect today in all the schools. The study provides information on different levels of competition between the teachers' unions, and the leeway for action that a union has as an interest group."

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