A teacher asks her learners to join sentences to make a short paragraph, inserting supplied connectors and coherence markers like (but, and, however, because, although, etc.) What is this approach to writing known as?

The Controlled-to-free writing approach is a structured approach where learners begin with controlled exercises (joining sentences with supplied connectors, completing partial paragraphs) and gradually move toward freer, independent writing. By providing connectors and asking learners to combine sentences, the teacher is at the controlled stage of the controlled-to-free continuum. Pure 'control composition' would offer less scope; free writing would have no constraints.