How do you tell a Green Ash from a Red Oak from a Silver Maple? Discover how to use a simple field guide and key to identify the trees of our region and learn how to recognize basic characteristics of the major tree groups. This non-technical introduction to trees includes both classroom instruction and field study at Emily Oaks. You will also receive your own "Tree Finder" pocketbook for future reference. Ages 18+. $16 for Skokie residents, $20 non-residents. To register, call 847-677-7001.