Bill has taught at the Packer Collegiate Institute, Bank Street School for Children, and the Berkeley Carroll School.

Alex Langbein has been affiliated with MKA for over 25 years---as a student (Class of 2003) and then as a teaching professional. Alex holds a BS in Sports Management and an MA in Early Childhood Education, both from Springfield College, Massachusetts. During his graduate studies, he was a Teaching Fellow and then selected as Class Marshall for his commencement. Alex has always been passionate about working with young children and was inspired to pursue a career in education and youth development by his experiences as a tennis professional. After completing his advanced degree and a short tenure as an in-classroom paraprofessional in the Essex Fells School system, Alex returned to his alma mater, initially as a Pre-K teacher and then, after five years, a Kindergarten teacher. His empathetic and caring approach helps each student achieve not only core competencies but also individual self-confidence and respect for fellow students. In addition to his classroom responsibilities, Alex coaches middle school sports at MKA, including the boys’ and girls' tennis teams and the boys' basketball team. His emphasis on inclusiveness for all players and good sportsmanship define his coaching style. Alex serves on key MKA committees (Health and Safety and School Status Advisory Team), liaising with faculty, parents, and administrative staff. For many years, he has been the consistently positive and enthusiastic morning greeter for the Lower School drop-off.