Effects of a 15-wk. computer-assisted course or regular instruction on concept development by 6-yr.-old kindergarten children in Ankara (M age of sample = 66.0 mo., SD = 4.6; M age of girls = 65.0 mo., SD = 4.4; M age of boys = 66.0 mo., SD = 4.5). Children were assigned to two groups of 40 (Experimental group: 18 girls and 22 boys; M girls’ age = 65.3 mo., SD = 3.7, M boys’ age = 67.1 mo., SD = 4.1; Control group: 21 girls, 19 boys, M girls’ age = 64.9 mo., SD = 5.01, M boys’ age = 66.7 mo., SD = 5.1). All were given the Bracken Basic Concept Scale-Revised and a general information form. Mean posttest scores in concept development for the group given computer-assisted training were statistically significantly higher.