Fourth graders strapped on their snowshoes and took to Centennial Field yesterday during P.E. for a romp in the snow. Snowshoeing is part of a P.E. program in which every class learns a life skill. Every student in PK through grade 2 learns to ice skate; third and fourth graders experience hiking trips; fifth and sixth graders learn to cross country ski; and sixth graders have the added bonus of learning to canoe and kayak.