Training for the fall season of school programs at the Arnold Arboretum begins Aug. 27. We are looking for outgoing and mature adults who can commit to two years of volunteering. You do not need to know about plants, but experience working with children is preferred. If you are interested, please contact the manager of children’s education by Aug. 20 for an interview. Email: childrensed@arnarb.harvard.edu Website: arboretum.​harvard.​edu/​support/​volunteer/