Please find the slides of the LISP recitation on last friday attached. (also linked at:http://www.public.asu.edu/~akalavag/fall2007_aravind_LISP_recitation.ppt ).
Some of you were asking me if I can recommend any quick online tutorial for LISP. You can use "LISP Primer" (http://mypage.iu.edu/~colallen/lp/). It is shorter with good examples, and covers all the stuff needed for LISP projects in this course.