This document discusses using the predictive text (T9) feature on mobile phones to teach spelling to students. It notes that English spelling has inconsistent letter-sound correspondence. The approach involves having students type words on the number keys without looking, so that incorrect spelling is noticed when the predictive text does not auto-complete the word. The advantages are that T9 is readily available, easy to access, and promotes students' noticing of correct spelling through feedback from the predictive text system.