St. Mary of the Assumption School is a coeducational Catholic elementary school founded by St. Mary of the Assumption Church in 1925, to serve the Catholic families of the greater Upper Marlboro area. This school is committed to the embodiment of the threefold educational mission of the Church: to teach the message of Jesus, to build Christian community, and to foster a concern for social justice. This is accomplished through an instructional program dedicated to academic excellence and vibrant faith aimed at the development of the whole child; that is, one who is spiritually, intellectually, socially, emotionally, and physically mature.

Technology in the classrooms

Each homeroom is equipped with an interactive whiteboard with built-in software to enhance teaching and learning with technology. Desktop computers are available for students to use various web-based learning sites, take Accelerated Reader tests, complete and deliver research, and type papers using word processors. Tablets are also used in the classrooms to enhance learning with apps, games, and informal assessments like Kahoot.

Data-Driven Curriculum:

Teachers at St. Mary of the Assumption use data from various assessments and classroom experiences to inform their planning and instructional approach. Students are grouped for both Math and Language Arts based on their academic ability. Teachers use data to help students reach their individual goals as well as grade-level mastery.


What are school hours?

The school hours are 8:00 am – 3:00 pm

Does the school offer before and After Care?

Before Care starts at 6:30 am and ends at 7:45 am. Aftercare begins at 3:00 pm and ends at 6:00 pm

Where do we order school Uniforms?

Do you have an Open House?

The last Sunday in January is St. Mary Open House from 11-1. We also give daily tours Monday through Thursday 9:00 am -2:00 pm during the school year.

Do you offer Scholarships?

Financial aid applications are to be filled out in Tads. Boost scholarships can be found at here.

Do you require volunteer hours?

Each family is required to do 20 hours of volunteer work.

Does St. Mary have a sports program?

St. Mary children can enroll for Basketball, Baseball, Softball or Soccer through the CYO Program.

Does St. Mary have foreign language?

Grades 1-5 have Spanish. Grades 6-8 can chose Spanish or French.

Does St. Mary have a lunch program?

St. Mary has an optional hot lunch program as well as pizza Tuesday. Monthly menus are sent home to the family and you can pick how many lunches your child would like to have. Each lunch is $4:00. Pizza Tuesday – Papa johns deliver pizza to the school and children who have pre-paid for the pizza at time of enrollment will be offered the amount of slices that were pre-ordered. You can also preorder for Milk Juice and water at the time of enrollment.

What specials does St. Mary have?

Art, Computer, Library Music, and PE.

Does St. Mary have an Instrumental Program?

Grade 4 -8 Saint Mary students can enroll for band through the Archdiocese of Washington at

What Extra Curricular activities does St. Mary have?

Rosary Club, Lego Club, Math Club, Art Club, and Drama Club

Does the students have an opportunity to participate in Mass?

St. Mary has Mass every school calendar Friday. Students celebrate mass by doing the readings and petitions, by joining the choir or being an alter server.

Does St. Mary offer transportation?

Children are brought to the school daily by their parents or carpools.

What is the birthday cutoff for PreK 3, PreK 4 and Kindergarten?

  • PreK 3 Students need to be 3 by September 1
  • PreK 4 3 Students need to be 4 by September 1
  • Kindergarten-3 Students need to be 5 by September 1