YWCA Greenwich Part-Time Summer Preschool Teachers. JOB DESCRIPTION. YWCA Greenwich has a prestigious, secular preschool and is currently looking for part- time teachers who are highly qualified, passionate and professional. All applicants must have experience working with young children. Hours for the positions are Monday through Friday 8:30 a.m. until 12:30 p.m. (June- Through August Only). Responsibilities and Duties. Provide a caring, comfort...