Of Lexington and Falmouth. Died peacefully in her Lexington home on November 28, 2015. Beloved wife of Nyles Barnert for 48 years. Daughter of the late William and Celia Levenson. Cherished mother of Lauren Weiss and her husband Mark of Lexington and Margot DeMuro and her husband Jeff of Fairfax, VA. Proud Nana of Matthew, Cayla and Abigail. Devoted sister of Bernice Bindman and Miriam Coffman, sister-in-law of Natalie and Steven Frier, and aunt to many nieces and nephews. Isabel graduated from Belmont High School, Tufts University (Jackson) and Lesley University. She began her career as a teacher, eventually focusing on special education. She taught in several local school systems, including Lexington. After retiring from teaching, she started a second career as a realtor, working for different agencies in Lexington until her retirement 15 years ago. She was active in Temple Isaiah, involved with many committees over the years as well as one of the first chavurot. She cherished the many friendships she developed throughout her life. She particularly enjoyed her afternoons of Mah Jongg and her summers on the Cape at Falmouthport. Services at Temple Isaiah, 55 Lincoln St., Lexington, on Wednesday, December 2, 2015 at 10:30 am. Interment at Westview Cemetery, Lexington. Condolence calls may be made at her residence following the interment until 9:00 pm, Thursday 1-4 & 7-9 pm, and Friday 1-4 pm. Donations in her memory may be made to Temple Isaiah or Dana Farber.