The top reported proficiency rate is 12% in English language arts. The lowest is 0% in Math.
Original Research by School Decision on Butterfield Charter
Butterfield Charter is a small charter school serving kindergarten through grade twelve in Porterville, with a current enrollment concentrated heavily in the upper grades: the vast majority of students are in grades ten through twelve. The enrollment is small in the early grades and grows substantially at the high school level, which shapes the school's academic profile and peer environment.
The school's academic results are notably weak across tested subjects. In the most recent state assessments, proficiency in math school-wide sits in the very low single digits, and proficiency in English language arts is around a seventh of students. Science proficiency is similarly low. When compared against the performance distribution of districts in Tulare County, Butterfield's overall proficiency index places it in the bottom quartile. These results represent genuine academic struggle, not variation within a typical range. A parent considering this school would want to understand directly from the school what instructional approaches are being used to address these gaps and what support structures exist for students who are not yet proficient.
The student body is predominantly Hispanic, at roughly three-quarters of enrollment, with smaller shares of white, Native American, and Asian students. A substantial majority of students—approximately seven in ten—qualify for free or reduced-price lunch, indicating an economically stretched population. The school does not report specific counts for English learner enrollment or special education, so detailed information on those populations is not available in the public record.
State testing data for grades five through seven are either missing or suppressed, making it impossible to see a complete academic picture across the full enrollment. This gap often reflects small cohort sizes in those grades, which the enrollment numbers support: grades five and six together enroll only a handful of students. The school's structure is essentially two entities: a very small elementary through middle school tier in kindergarten through grade eight, and a much larger high school tier in grades ten through twelve.
Porterville Unified, the district that oversees charter schools in the area, has built a district-wide career-pathways model in which nearly every high school student is enrolled in a college-and-career pathway tied to local industries like energy, aviation, and agricultural technology. The district reports strong outcomes from this approach, with the majority of pathway graduates going on to postsecondary education. Recent state and federal investments have expanded work-based learning opportunities, including paid internships. It is unclear from the available data whether Butterfield Charter participates in or is designed around these pathways. A family interested in this school would want to ask whether high school students have access to those pathway programs and what college-preparation and career-technical course options the school itself offers.
Porterville itself is a mid-sized city in the southern San Joaquin Valley serving as an economic hub for the Southern Sierra region. The local economy blends agribusiness, light manufacturing, retail, healthcare, and education. The housing market shows modest values for the county context, with rents also moderate. The city is experiencing growth through new residential subdivisions and mixed-use development. Civic life centers on a historic downtown with walkable access to parks, a library, and transit, though much of daily activity outside downtown is automobile-oriented along highway corridors.
The school's very small K-8 enrollment relative to its high school enrollment is its most distinctive structural feature. Parents should clarify with Butterfield directly what accounts for this difference: whether the school serves students who enroll primarily for high school, whether it is new and still building earlier grades, or whether families tend to transition to other schools as their children move through the elementary years.
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