Bender, W / 1996 / Teaching students with mild disabilities / Allyn and Bacon Cohen, E, G / 1994 / Restructuring the classroom: conditions for productive small groups / Review of Educational Research 64 (1) : 1 ~ 35 Ellis, E. S / 1998 / Goals: An approach to motivation and achievement / Journal of personality and social psychology 54 : 5 ~ 12 Filbin, J / 1993 / Ideas and suggestions for curricular adaptations at the secondary level: Colorado Effective Education Model / Colorado State Dept. of Education Mastropieri, M. A / 1998 / Science education for students with disabilities: a review of recent reserch / Studies in science education 32 : 21 ~ 44