The freedom of teachers and students to express their ideas in school without religious or political or institutional restrictions WordNet 3.0 & Open English WordNet

Academic freedom is a moral and legal concept expressing the conviction that the freedom of inquiry by faculty members is essential to the mission of the academy as well as the principles of academia, and that scholars should have freedom to teach or communicate ideas or facts without fear of repression, job loss, or imprisonment. Wikipedia

Liberty of educational institutions to decide courses and research, and of teachers to teach subjects, without outside coercion Wikidata

The belief that the freedom of inquiry by students and faculty members is essential to the mission of the academy. OmegaWiki

The right to teach or learn freely without unreasonable interference from authority, or fear of reprisal. Wiktionary