Mary Barstow Mastrangelo, a retired Lynnfield High School administrator and devoted wife, mother and grandmother, died Friday, November 20th after a courageous five-year battle against ovarian cancer. She was 64. Born in Malden, one of three children of John and Katherine Barstow, she grew up in the shadow of the Bunker Hill Monument in Charlestown, fitting to her heritage as a Daughter of the American Revolution. She attended Mount Saint Joseph's High School in Brighton and graduated from Salem State College with a degree in education, later earning a Masters degree in counseling from Salem State and a CAGS in administration from Suffolk University. Mrs. Mastrangelo started her career as a teacher at Everett High School, where she met her one and only true love, her late husband Andy. Later she moved to Lynnfield High School, where she started as a guidance counselor, and ended her career as the Director of Guidance. Over the course of her two decades in Lynnfield, Mrs. Mastrangelo touched the lives of countless students, many of whom kept in touch with her long after they graduated. Upon her retirement from Lynnfield High school in 2004, Mrs. Mastrangelo continued to advise college-bound friends and family members. Additionally, she began teaching master's degree classes in guidance counseling at both Salem State College and Cambridge College. These courses allowed her to extend her expertise beyond the classroom and to enjoy supervising counselors-to-be in school settings. Mrs. Mastrangelo's house was always the central gathering place for family and friends - especially on holidays. Known for her graciousness and hospitality, she managed to make people feel extraordinary as she chatted with them over a cup of tea. Mrs. Mastrangelo was a superb decorator, crafting everything with impeccable detail and flair, from small bows on friends' birthday presents, to a flawlessly set Thanksgiving table every fall, to twenty towering and elegant silk flower centerpieces for her daughter's wedding. Mrs. Mastrangelo had been a resident of Melrose since 1973. She leaves a son, Andrew J. Mastrangelo Jr., and his wife Elizabeth (Torpey); a daughter, MaryKate Isakson, and her husband Hunter, all of Melrose; and grandchildren Madeline E. Mastrangelo, Andrew T. Mastrangelo, and Tess H. Isakson. Caring sister of John N. Barstow & his wife Maureen of Melrose and Gregory G. Barstow & his wife Gayle of Nevada. Funeral from the Gately Funeral Home on Wednesday Nov. 25th at 8AM. Funeral Mass in St. Mary's Church, Herbert St., Melrose at 9AM. Relatives & friends respectfully invited. Visiting hours on Tuesday from 3-7PM. Burial in Holy Cross Cemetery, Malden. In lieu of flowers, donations can be made in Mary's name to Winchester Hospital Cancer Care Center, 41 Highland Avenue, Winchester, MA 01890.