ȭڴб а . 1969 ȭڴб ûа , 1983 ̱ ״б, а(Department of Educational Communications and Technology) ڻ Ͽ. ̱ б ҿ Ȱϴٰ 1994 ȭڴб а α Ͽ 2012 8 ߴ. п ̾߱⡻(迵, 1997), ̼ ! ̼ǡ(迵, 1999), ̼, ϳ (迵, 2004), : ã Ѹ ٱ⡻(л, 2004), Ʈ ƼĪ(Ͽ콺 ߾, 2005) ִ. δ ġ 20 Ⱓ ǵǰ ִ ̷ȸ С(л, 2008) 21 縦 С(л, 2011) ִ. ũ, н ݱ(A. W. Tony , ȭڴбǺ, 1997) δ : ǿ (л, 1995) : ǿ (л, 2009) ִ. ߿ ϰ ִ.