Principal Calvin

    Dr. Jim Calvin, Principal 

    Dr. Jim Calvin

    My name is Jim Calvin, and I have 32 years of experience in education as a teacher, coach, and administrator.  I began my administrative career in Carroll ISD as the Assistant Principal of Durham Elementary & Intermediate School.  My wife, Nancy, is currently a teacher at Eubanks Intermediate School.  I am looking forward to joining her and our three children as Dragons.  Nancy and I enjoy cheering for them as they participate on the Dragon Cross Country Team or at their gymnastics competitions. 
    Since leaving Carroll ISD 21 years ago, I have served as principal in various districts throughout the DFW Metroplex.  I earned my Bachelor’s degree in English Language Arts Education from Texas Wesleyan University, my Master’s degree in Educational Administration and Doctorate in Educational Leadership from Texas Christian University.  
    It is an honor to return to Carroll ISD because there is something special about the bond that connects all of us as Dragons.   I am grateful for the opportunity to partner with the wonderful families and dedicated staff at Walnut Grove Elementary as we work together to see all of our Dragons shine!



    Ashraf Mobh, Assistant Principal
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    Ashraf Mobh has eighteen years of experience in education.  She began her educational career as a Fourth Grade Teacher in Duncanville ISD. After ten years with Duncanville ISD, she moved to Highland Park ISD where she was again a Fourth Grade Teacher. She earned her Bachelor’s degree in Interdisciplinary Studies from the University Texas at Arlington and her Master’s degree in Educational Leadership from Dallas Baptist University. 

    Ms. Mobh’s leadership experiences and professional memberships include:

    • Fourth Grade Teacher, Highland Park ISD (8 years)
    • Fourth Grade Teacher, Duncanville ISD (10 years)
    • 2020 Unsung Hero District Award – Highland Park ISD
    • 2014 Teacher of the Year – Highland Park ISD
    • 2014 Park Cities Gifted and Talented Teacher of the Year
    • Fourth Grade Team Leader, Duncanville ISD & Highland Park ISD
    • National Thinking Maps Conference Facilitator
    • Diversity Trainer – Highland Park ISD

    Dana Gamache

    Dana Gamache, Counselor
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    My name is Dana Gamache. I am the school counselor and thrilled to support our students, teachers, and parents in any way possible. I take great pride in knowing the students. They will often ask me, “How do you know so many names?”  This is my twenty seventh year in education. I started my counseling career at Durham Elementary twenty-four years ago. I came to Walnut Grove the year it opened.

    I have three kids. My oldest daughter is studying special education at Louisiana Tech University. She substitutes at Walnut Grove when her schedule allows. My son is a senior at Carroll Senior High school and my youngest is a sophomore at Carroll High school. We have five dogs, four of which are King Charles Cavaliers. We have one in each color.  Hux, our ruby cav, is a school therapy dog and gets the honor of coming to Walnut Grove a couple days a week. My husband, Dave, takes care of the dogs during the day when we are all at school.


    Jolie Allen, Principal Secretary
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    My name is Jolie Allen and I have been at Walnut Grove Elementary since 2014.  My family and I moved to the area in 1991 and we love it. We have four sons who have graduated from Carroll: Blake ’08, Drew ’10 and Brent ’12, and Craig in ‘16.  I attended BYU where I met my husband and we have sent our 4 sons to school there. We love cheering on the Dragons on Friday nights and especially enjoy the Dragon Band and Jazz Band. I also have a deep and abiding love for the Dallas Mavericks.

    Cheryl Bischof

    Cheryl Bischof, Campus Secretary & Registrar
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    I’m Cheryl Bischof and I have worked for the district since 2006 and I have B.A. in History from the University of Texas at Arlington.  My family and I have lived in Southlake for over 17 years now.  We have a son at the University of Nebraska in Lincoln, Nebraska.  I am an avid fan of the Harry Potter series and Nebraska Football. GO BIG RED!

    It’s always a joy to see the little faces both here at school and out in the community, so be sure and say “Hi!”


    My name is Stefanie McCarty Mahan and I am excited to be a part of Walnut Grove! I come from Keller ISD where I spent 2 years as a substitute teacher and 4 years as an office assistant on an elementary campus in their district.  I love people, I love to serve, and I’m looking forward to the relationships and the friendships that will be formed here at The Grove! I have 3 daughters, two of which are in middle school and one who is in elementary.  I am a cheer mom, a soccer mom, a dance mom and a band mom! I am newly married to the love of my life. We got married and then 1 month in we were locked up together due to the Corona-virus pandemic.  What better way to get acquainted with your new husband?!! We are very active members of our church in Keller, TX where my husband serves on the worship team as a guitar player and I love to volunteer as much as I can with the kiddos, specifically the students ministry. In my spare time I love to travel, I love to eat, I enjoy cooking, and I love a good pair of running shoes. Andy’s frozen custard is my weakness & I love to be in the summer sun! (You will often find me holding a cup of coffee in hand!) Looking forward to meeting you!