The document discusses Gerald Grow's Staged Self-Directed Learning (SSDL) model, which proposes that learners progress through four stages of self-direction - from dependent to self-directed - and that teaching styles should match the learner's current stage. The four stages are: dependent (authority/coach), interested (motivator/guide), involved (facilitator), and self-directed (consultant/delegator). The SSDL model provides a framework to help teachers select teaching styles that support advancing learners' self-direction skills. While beneficial, limitations include difficulty assessing a learner's current stage and the need for teachers to flexibly adapt their styles.