Creativity in writing isn’t spontaneous; it’s crafted. This chapter challenges the myth of creative writing as a free-flowing, innate gift and argues instead that creativity flourishes through deliberate constraint. Just as poetic forms impose rules that heighten expression, structured sentence routines help students make purposeful, stylistic choices. Using the 30 creative sentence structures introduced across Key Stage 3, students learn to control syntax, evoke atmosphere, and vary rhythm. Each sentence type – whether a participial opener, “comma sandwich,” or “let loose” list – acts as a creative tool, allowing students to practise voice, tone, and imagery with precision. Central to this approach is Slow Writing : the disciplined, sentence-by-sentence rehearsal of style. Far from limiting freedom, constraints reduce cognitive load and offer young writers a scaffold for experimentation. As fluency grows, students move from assembling isolated effects to shaping vivid, expressive paragraphs and confident narratives. By foregrounding grammar, structure, and repetition, the C25K model empowers students not just to write creatively but to think creatively, using language as a medium of intention, not guesswork. Style is not a happy accident; it is something constructed: deliberately, cumulatively, and sentence by sentence.