The top reported proficiency rate is 44% in English language arts. The lowest is 40% in Math.
Original Research by School Decision on Marthasville Elementary
Marthasville Elementary is a regular public school serving kindergarten through sixth grade, part of the School District of Washington, and located in the small rural town of Marthasville in Warren County, Missouri. With an enrollment in the low hundreds, the school is small enough that families moving into the area will find a tight-knit setting where teachers and staff know most students by name.
The academic picture comes from the 2024–25 Missouri Assessment Program results, and it is something of a mixed bag. In some tested grades the data are suppressed, which is common in a school this size where small class counts can make individual students identifiable. Where results were reported, fourth graders posted math proficiency below a third of students, while sixth graders reached above half proficient in math. In English language arts, the sole reported grade—third grade—showed just under half proficient. Across all tested subjects and grades, the school’s overall proficiency index is the highest among the two districts in Warren County. The comparison set is narrow, however; being top relative to just one other district does not signal overall strength in absolute terms, and the suppressed results mean a parent cannot see the full picture for every grade. A parent may want to ask the school directly for results in the grades that were masked.
The peer environment is homogeneous. The student body is overwhelmingly white, with a very small Hispanic population and a modest share of students identifying as two or more races. About two-fifths of students qualify for free or reduced-price lunch, an indicator of some economic diversity. Data on special education identification and English learner status were not available, so it is unclear what range of learning supports are in place. The small class sizes—most grades have roughly two dozen students—suggest the potential for personalized attention, but the school’s website and data did not provide specifics on staffing ratios, counselor availability, or program offerings such as art, music, or gifted education. That information is worth seeking out directly.
Marthasville itself is a town with distinct character, and the school grounds are part of that community rather than an isolated campus. The town sits along the Katy Trail, a long rails-to-trails bike path that draws visitors, and its German heritage and surrounding wineries give it a quiet, rural identity. Residents are roughly an hour from St. Louis but far from suburban density. Housing values in the Marthasville ZIP code sit around the mid three-hundred-thousand range, somewhat below the national median, and the area has seen steady but modest population growth over the past decade. The School District of Washington covers a fairly wide geographic area; Marthasville Elementary is one of several elementary schools feeding into Washington Middle and High Schools. No major district changes—bond issues, boundary shifts, or curriculum overhauls—were identified in recent years, so a parent can expect relative stability in district operations.
What is missing matters as well. There is no information on chronic absenteeism, discipline rates, teacher experience, or the school’s Title I status. The school does not serve high school grades, so graduation rate is not applicable. For a parent evaluating options, this means some of the typical checkpoints are blank. The available data suggest a small, largely white elementary in a stable rural town, with academic performance that varies by grade and subject and where the strongest comparison is only against one other district. For families who value a low-key rural setting with outdoor access and a manageable commute to the Washington area, this school fits. For those looking for robust extracurricular programs or a more diverse student body, the picture is thinner, and a visit or conversation with the principal would be the best next step.
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