BILL SPARKES/Acorn Newspapers ONE LAST JUMP FOR SUMMER?—Grayson Brugh, 13, gets nearly three feet of air underneath him as he sails over a pyramid block on his skateboard at Borchard Skate Park in Newbury Park. Grayson, who returned to Sequoia Middle School as an eighthgrader today, says his favorite subject, not surprisingly, is physical education. Classes reopened today throughout Conejo Valley Unified School District. Please see related story, upper left.