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Working together for student academic success by providing nutritious meals in a cost effective and pleasant environment.


 District calendars are listed and approved two years in advance. For individual schools, only campuses with Google Calendars are featured here.


NISD's mission is to provide all NISD students who are eligible to ride the bus a safe, efficient, nurturing environment that supports the educational and extra-curricular objectives of the district.


Northside ISD continues to enforce its “No Shots, No School” policy. Texas law requires all public school children have current immunizations in order to attend class.

Campus Information

Year Open:

School Mascot: Dolphin

School Colors: Teal

Mission Statement:
HOLMGREEN MISSION: Providing a positive and encouraging environment with innovative programming

HOLMGREEN VISION: Every student transforms academically, socially, and developmentally

Empower, Encourage, Have Fun!

Portrait of Holmgreen Principal
Sandra Valles - Principal
Mrs. Sandra T. Valles has been in the education field since 2007. She became Holmgreen's principal in March of 2020. She believes all students deserve a high-quality, caring, and nurturing environment to learn and grow for lifelong success.

Mrs. Valles is a former high school assistant principal, special education campus coordinator, and an ALE/Transition teacher working with students who have cognitive, physical and social emotional disabilities. In addition, Mrs. Valles served in the US Army and is a former New Mexico police officer. She is a graduate from the University of the Southwest with a Bachelors in Criminal Justice, a Masters in Education Administration, and is currently a doctoral candidate. She received her teacher and administrative certifications through UTSA and ACT. Mrs. Valles is married to a combat veteran, Erasmo Valles, and they have three children, Ty, Lorenzo, and Tatianna.

Yolanda Carlson - Associate Principal

The Associate Principal also serves as the Campus Behavior Coordinator. They can be reached by email at or by phone at 210-397-5460.

Ms. Carlson has been an educator at Holmgreen since 1991 in various different roles, such as a teacher, specialist, coordinator and administrator. She has her Masters in Education in Admin Leadership from Trinity University and nearly 15 years experience of being an administrator. Ms. Carlson is a South Texas native and UT Austin Alumni. Go Longhorns!

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