Teaching additional languages means teaching a second, third or further language within students’ countries of origin or in countries to which they have migrated. Because there are so many languages in the world and so many reasons why students should learn them, the teaching of additional languages is a great challenge and opportunity for educators. | INTERNATIONAL ACADEMY OF EDUCATION INTERNATIONAL BUREAU OF EDUCATION Teaching additional languages By Elliot L. Judd, Lihua Tan and Herbert J. Walberg EDUCATIONAL PRACTICES SERIES–6 PRACTICES EDUCATIONAL The International Academy of Education The International Academy of Education (IAE) is a not-for- profit scientific association that promotes educational research, its dissemination, and the implementation of its implications. Founded in 1986, the Academy is dedicated to strengthening the contributions of research, solving critical educational problems throughout the world, and providing better communication among policy makers, researchers and practitioners. The seat of the Academy is at the Royal Academy of Science, Literature and Arts in Brussels, Belgium, and its co-ordinating centre is at Curtin University of Technology in Perth, Australia. The general aim of the IAE is to foster scholarly excel- lence in all fields of education. Towards this end, the Academy provides timely syntheses of research-based evidence of international importance. The Academy also provides critiques of research, its evidentiary basis, and its application to policy. The current members of the Board of Directors of the Academy are: • Erik De Corte, University of Leuven, Belgium (President) • Herbert Walberg, University of Illinois at Chicago, United States of America (Vice President) • Barry Fraser, Curtin University of Technology, Australia (Executive Director) • Jacques Hallak, Paris, France • Michael Kirst, Stanford University, United States of America • Ulrich Teichler, University of Kassel, Germany • Margaret Wang, Temple University, United States of America 2 Series preface Teaching additional languages means teaching a second, third or further language within students’ countries of origin or in countries to which they have migrated. Because there are so many languages in the world and so many reasons why students should learn them, .