BILL SPARKES/Acorn Newspapers SPIC 'N' SPAN-Waahid Azizuddin, 14, from Westlake Village, talks with Cody Petersen, 14, and Adam Estrin, 14, both of Oak Park as they work on science papers. The students are sitting at picnic tables that were power washed by parents who took it upon themselves to improve the physical appearance of the high school campus. In addition to cleaning tables and sidewalks, planting flowers and painting doors and curbs, the parents also plan to install a small park near building G9.