About St. Mark’s
Founded in 1906, St. Mark's School of Texas is a non-sectarian, college-preparatory, independent day school for boys in grades one through twelve. The School’s charter states that it is “designed to afford its students well-rounded physical, intellectual, moral, and religious training and instruction.” The School is intended to be a diverse community of teachers and students who share a love of learning and who strive for high achievement in whatever they undertake.
St. Mark’s aims to prepare young men to assume leadership and responsibility in a competitive and changing world. To this end, the School professes and upholds certain values. These values include the discipline of postponing immediate gratification in the interests of earning eventual, hard-won satisfaction; the responsibility of defending one’s own ideas, of respecting the views of others, and of accepting the consequences for one’s own actions; and an appreciation for the lively connection between knowledge and responsibility and the obligation to serve.
Position Description
St. Mark’s School of Texas is seeking an experienced Extended Day Assistant beginning in the 2026-2027 school year. Extended Day Assistants are expected to create a safe and loving environment for children after the school day. Extended Day Assistants in our Extended Day Program (EDP) must be able to supervise play and engage children from first grade through fourth grade in age-appropriate activities.
Start Date: August 24, 2026
Work Hours: Part-Time, Monday through Friday, 2:30 pm to 6:00 pm.
Responsibilities
- Provide children with a snack each afternoon
- Maintain a calm and productive work environment in which children are able to complete homework
- Engage with children and redirect them if necessary
- Help prepare activities as necessary
- Assist in cleaning up and organizing room after activities, if needed, in various play environments
- Greet parents as they pick up their child in a friendly and professional manner
- Performs other related duties as assigned
Experience, Qualifications & Skills
- Prior experience with children is preferred
- Provide consistent guidance and redirection
- Adhere to and enforce discipline policies of the school
- Provide a loving, healthy, and safe environment for children
- Demonstrate patience when interacting with children, parents, and colleagues
- Communicate effectively and professionally with program directors
Work Environment
- While performing the duties of this job, the employee is frequently exposed to outside weather conditions. The noise level in the work environment is usually moderate. EDP staff must be willing to work with all age groups, grades one through four
- Work schedules will be determined by staffing needs. Please note that the Extended Day Program is not offered on non-regular school days.
Skills Required
- Prior experience with children
- Ability to supervise play and engage children in age-appropriate activities
- Provide consistent guidance and redirection
- Adhere to and enforce school discipline policies
- Provide a loving, healthy, and safe environment for children
- Demonstrate patience with children, parents, and colleagues
- Communicate effectively and professionally with program directors
- Willingness to work with grades one through four
What We Do
St. Mark's School of Texas is a private, nonsectarian, college-preparatory independent day school for boys in grades 1 through 12, located in Dallas, Texas. Founded in 1906, the school focuses on providing well-rounded physical, intellectual, moral, and spiritual education, preparing young men for leadership and responsibility in a changing world through a rigorous academic curriculum and a supportive community.
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