I was solving the exercise no 6.6.2 from htdp, this is what i came up with. ;template (define fun-for-circle (lambda(a-circle)(circle-center a-circle)(circle-radius a-center)(circle-color a-circle))) (define-struct circle (center radius color)) (define a-circle(make-circle(make-posn 110 30) 30 'yellow)) (define draw-a-circle(lambda(a-circle) (draw-circle ( circle-center a-circle)(circle-radius a-circle)(circle-color a-circle)))) (start 300 300) (draw-a-circle a-circle) But i am not sure this is the right way to approach this problem , i have used draw-circle to implement draw-a-circle .Any help is appreciated in improving the solution. Aditya