On Monday, December 30, 2019, John W. Crum, of Wilmington, loving husband, father, and grandfather, passed away at the age of 78. John was born on April 7, 1941, in Mapleton Depot, Pennsylvania, to Lawrence and Nellie Crum. He attended the U.S. Naval Academy and graduated from Shippensburg University in 1964 with a BS in Education. He earned an MA and a PhD in History, both from the University of Delaware, in 1972 and 1980, respectively. John began teaching Social Studies at Mt. Pleasant High School in 1964, retiring in 2002, and was named the Brandywine School District’s Teacher of the Year in 1983. He taught as an adjunct history professor at the University of Delaware from 1976 until October 2019. John was heavily involved in the Advanced Placement Program, writing AP test prep books, conducting workshops, and grading AP exams, and was the author of books to help students perform better in their history courses. He also was very involved in many church activities at The Lutheran Church of the Good Shepherd and enjoyed reading mysteries, traveling, and spending time with his grandchildren. Survivors include his wife of 57 years, Karen (Enck) Crum, daughters Laurette Crum of Alexandria, Virginia, and Leslie Loder (Rurik) of North East, Maryland, grandchildren Alexis and Holden Loder, brother James Crum of Chambersburg, Pennsylvania, and several nieces and nephews. Visitation will be held on January 10, 2020 from 6:00 until 9:00 p.m. at McCrery and Harra Funeral Home, 3924 Concord Pike, (Rt. 202 South of Silverside Road) Wilmington, DE 19803. A memorial service will be held on Saturday, January 11th at 11:00 a.m. at The Lutheran Church of the Good Shepherd, 1530 Foulk Road, Wilmington, DE 19803. In lieu of flowers, memorial donations may be made to The Lutheran Church of the Good Shepherd, 1530 Foulk Road, Wilmington, DE 19803 or to the American Diabetes Association, 2451 Crystal Drive, Suite 900, Arlington, VA 22202. To send condolences visit: www.mccreryandharra.com.