Project Learning Tree will present a professional-development workshop for teachers of ages 3-6 — Environmental Experiences for Early Childhood (PreK-K) — at Great Brook Farm State Park in Carlisle on September 9, 10AM-1:30PM. Cost is $16 per person. For questions or to register (by September 2), contact Gini Traub at Gini.Traub@state.ma.us or 413-584-6788. Project Learning Tree’s award-winning environmental-education program is sponsored by the Massachusetts Executive Office of Energy and Environmental Affairs.