[1] Ruhl K L, Hughes C A, Schloss P J. Teacher Education and Special Education, 1987,10:14[2] Bonwell C C, Eison J A. Active Learning: Creating Excitement in the Classroom. Washington DC: George Washington University,1991[3] Cooper M J. Chem Educ, 1995,72:162[4] Albanese M A,Mitchell S. Acad Medicine,1993,68(1) :52[5] Kovac J J. Chem Edu,1999,76( 1 ) :120