9KIRSCHNER P A, SWELLER J, CLARK R E. Why minimal guidance during instruction does not work: An analysis of the failure of eonstructivist, discovery, problem - based, experien- tiM, and inquiry- based teaching [J]. Educational Psycholo- gist, 2006, 41 (2): 75-86.
10HUDGINS B B, EDELMAN S. Children' s self - directed criti- cal thinking [ J]. Journal of Educational Research, 2001, 81 (5) : 262 - 273.