The same meritocratic approach governs the development and promotion of teachers. Top-performing teachers are given leadership responsibilities without excessive regard to tenure, and there is a revolving door between the education ministry, classrooms, and school administration. Educators are frequently seconded to carry out policy work. Many subsequently choose to return to the classroom.
Read more at http://www.project-syndicate.org/commentary/lee-kuan-lew-singapore-education-legacy-by-stavros-n--yiannouka-2015-04#SXwYrZTE8Oz203Lw.99