Which approach to writing gives scope for learners to undergo different stages of writing in order to learn to write?

A teacher encourages learners to move through the stages of planning, brainstorming, and drafting before finalizing their writing piece. The teacher is following the:

Aamir, a Class 4 language teacher, forms groups of five and assigns the topic, 'My experiences with my pet'. He asks them to brainstorm, create an outline, write the first draft, edit, and then write the final paragraph. Which approach to writing is being practiced here?