This chapter analyzes the evolution of the Federation of Colombian Educators (FECODE) in the 1980s and 1990s, to show how and why factionalism took hold. It first examines the Pedagogical Movement of the 1980s, a teaching-oriented social movement that reveals a fundamental split between the radical and moderate lefts. This movement sheds light on why the union was initially included in policy negotiations. It then examines broader changes in teacher–state relations that culminated in FECODE’s role in negotiating an education decentralization package that strengthened the national executive committee. The last section analyzes how the political opening contributed to more hierarchical relations and deepening political divisions.