There are many kinds of corrective feedback for SLA learners, which include explicit feedback, recast and prompts. Since teacher plays a very important role in SLA teaching, we should carefully use corrective feedback. From the book A Research Agenda For Second Language Acquisition Of Pre-literate And Low-literate Adult And Adolescent Learners' s examples and my own real teaching experience, I assume that teacher should choose different corrective feedback to different students. Their learning abilities, English levels as well as their characteristics and personalities should be all taken into account when you are giving a corrective feedback to students. In other words, as a SLA teacher, we should teach students in accordance with their aptitude. And teachers better use different corrective feedback when they are going to response or react to their different students.