DISD School Board of Trustees

2021-2022 board group pic for web.jpg

Seated, left to right: Board Secretary Linda Flemming, Board President Bob Rhoden,

Board Vice-President Becky Russell
Standing, left to right: Shelle Cassell, David Hawley, Scott Marr, Bruce Hysmith


Shelle Cassell

Place 1     Ward Zone 6     

Term Start: 2021     Term End: 2024

Shelle is a graduate of Denison High School. She returned to Denison after completing a Bachelor of Science in Journalism and Advertising Design from the University of North Texas. Her work experience includes a full-service advertising agency, the healthcare industry, and 31 years as Director of Marketing and Public Information at Grayson College. After retirement from GC, she worked for the Denison Chamber of Commerce and Southeastern Oklahoma State University. Shelle’s support of the community and education is illustrated through her service and appointments to many civic, economic development, statewide, and public education boards and committees. Shelle was an active member of the Denison ISD Facilities and Bond committees. She is currently serving, or has recently served, on the Denison Education Foundation (past President), Texoma Health Foundation, Denison Chamber of Commerce (past Chairman of the Board), and Denison Development Foundation (past Chairman of the Board). Her husband, Randy, and their two sons, are all Yellow Jackets. Their granddaughter attends Denison schools, and their daughter-in-law, who moved to Denison in 2016, is quickly learning that It’s Great To Be A Yellow Jacket.


Bob Rhoden

Place 2     Ward Zone 3     

Term Start: 2015     Term End: 2024

Bob has served Ward 3 on the Denison ISD School Board since 2015 and currently holds the position of board president.  Bob and his wife Loretta have lived in Denison since 2001 and have two sons, Koby and Kyle, who attend DISD. Bob has a degree in Counseling, and serves as Executive Director of Four Rivers Outreach in Sherman.  Prior to this position he spent more than 20 years in workforce development, including 16 years with Workforce Solutions Texoma.  Loretta, herself a Yellow Jacket, is Vice President of Operations with the Denison Development Alliance.  Prior to becoming a Board Trustee, Bob served as Chair of the Bond Oversight Committee, and served on the DISD Bond Committee, DHS Campus Improvement Committee, Lamar Elementary Campus Improvement Committee, as well as the District Wide Improvement Council.  Bob also serves on the Board of Directors of the Denison Education Foundation, where he is Past President.  He is Past President of the Boys & Girls Club of Denison and North Texas Youth Connections, and served as Vice President on the Denison Chamber of Commerce Board.  He currently serves as Chair of the Texoma Homeless Coalition, and was recently elected to the Board of Directors of Share: Taking it to the Streets.  Bob is an Ordained Minister and former Youth Pastor and Music Minister.  He and his family attend Victory Life Church in Sherman.


David Hawley

Place 3     Ward Zone 2     

Term Start: 1998     Term End: 2022

David has served on the Denison ISD Board of Trustees since 1998. David served as a Deacon for 10 years and is currently an Elder at the First Christian Church in Denison. David and his wife Kathy were married in 1983. Kathy is a Deacon at First Christian Church and works in the nursery. Both David and Kathy are graduates of Denison High School. They have two sons, both Eagle Scouts, who are also graduates of DHS. David retired from the Grayson County Sheriff’s Office in July 2014 after proudly serving 34 years. He spent the last ten years of his L.E. Career supervising the Civil Section, Crime Prevention and Public Relations. After a short five-month retirement, David ran for and was elected Grayson County Justice of the Peace for Precinct 2. David is active in the Truancy Prevention Efforts by visiting the school in his precinct, talking to at-risk students, and attempting to intervene with alternative in hopes they won’t be referred to come before his court. David is active in the Boy Scouts and has been awarded several awards in his 20+ years in scouting. David is active in civic groups and organizations and utilizes his scouts to help volunteer in his community. In his spare time, David enjoys spending time traveling with his wife Kathy and riding their SeaDoo’s on Lake Texoma and riding through the piney woods of East Texas in their side-by-sides. 


Bruce Hysmith

Place 4     Ward Zone 4     

Term Start: 2001     Term End: 2022

Bruce has been a Denison ISD school board trustee for Ward 4 since 2001 when he was appointed to fill a vacancy in Ward 4. During his tenure on the board, he has served as both president and vice president. Bruce and his family moved to Denison from Palacios in 1977, and with the exception of their son, Bill (who graduated from Palacios High School in 1977), all of the Hysmith children (Larry, Jennifer and John) attended Lamar Elementary School and graduated from Denison High School. Additionally, five grandchildren are graduates of DHS and two are currently DISD students, along with one great-grandchild. Bruce’s wife, Wanda, retired from DISD in 1999 after 20 years of service; Bruce recently retired in 2015 after a 41-year career with Texas Parks and Wildlife Department as fisheries biologist for public waters in eight north Texas Counties, including Lake Texoma. As a school board trustee, Bruce is proud to have been part of  the recent upgrading of DISD facilities, the construction of the new Denison High School and the extensive renovation of Munson Stadium. Along with improved facilities, Hysmith says he is also proud to continue the tradition of excellence in education at Denison ISD. “It is great to be a Yellow Jacket!”


Linda Flemming

Place 5     Ward Zone 1     

Term Start: 2016     Term End: 2022

Linda is a Denison native who graduated from Denison High School in 1972. She began working in various capacities in the banking industry until her retirement in 2015. Her husband, Lester, is a retired educator. Linda and Lester are the proud parents of two children and five grandchildren. Linda, her son, and her grandson all received Munson Foundation Scholarships upon graduation from DHS. Linda’s hobbies are reading and encouraging her grandchildren in their various activities. She was appointed to the board in August 2016 to fill the vacancy in Ward 1, Place 5.


Scott Marr

Place 6     Ward Zone 7     

Term Start: 2020   Term End: 2023

Scott graduated from University of Oklahoma, in 1992 with a Bachelor of Science in Kinesiology and a masters degree in Education from University of Central Oklahoma.  Scott attended Oklahoma on a baseball scholarship and played in the 1992 College Baseball World Series.  After graduating he became a baseball coach and was coach of the year in the Alaskan summer league. In 2014, Scott was inducted into the Denison High School Sports Hall of Fame.  Scott is a Denison native and graduated from Denison High School in 1988. He moved back to Dension in 1999 and now is a part of the family business, operating 68 consumer lending offices in Texas, along with 3 Pawns Shops. Scott also manages multiple real estate properties in the State. During his time in Denison, Scott has served as the President of Denison Little League, Lamar Elementary Campus Improvement Committee, Children’s Advocacy Center board member for 5 years, and on the Texas Consumer Finance Association board of directors.  Scott’s family is a member of Park Avenue Church of Christ, Denison Tx.  Scott has been married to his wife, Kim, for 26 years, and has 3 children, Andrew, Olivia, and Madeline.  Scott enjoys playing golf and spending time with his family on Lake Texoma.  His favorite Bible Scripture.” But those who trust in the lord will find new strength, they will soar high on wings like eagles, they will run and not be weary, they walk and not be faint.” Isaiah 40:31.   


Becky Russell

Place 7     Ward Zone 5     

Term Start: 2019     Term End: 2023

Becky graduated from Abilene Christian University in 1975 with a Bachelor of Science in Education with a certification in Early Childhood. Becky has been a resident of Denison for 43 years. She married a Denison Yellow Jacket and former B. McDaniel Science teacher, Jim Russell. She taught one year in Hamlin, Texas, but the rest of her 33 years of education took place in this Denison. Becky taught 17 years as a first grade teacher at Lamar. Later for 16 years, she served as a Gifted and Talented teacher for the district rotating elementary campuses every three years. In conjunction, while teaching GT, she became a Kindergarten/1st grade curriculum coordinator for 12 years. Finally, the last 10 years, she helped develop and implement the current mentor training for first year teachers. She serves on the Denison Education Foundation and is a member of the Denison Performing Arts. Becky and Jim have three Denison graduates, Andy, Katie and Amy. They have been blessed with 10 grandchildren, two of which are young Yellow Jackets. The family attends Park Avenue Church of Christ, where Becky is involved with Children's ministry and the Women's Ministry. When asked, why school board? Becky says often, "I am passionate about this district! I have a big love for teachers and kiddos! My service is not complete!"