The top reported proficiency rate is 62% in English language arts. The lowest is 50% in Math.
Original Research by School Decision on Alturas Preparatory Academy Inc
Alturas Preparatory Academy is a single-school charter district in Idaho Falls serving grades six through twelve. It opened its doors at the start of the 2021-2022 school year, beginning with the lower secondary grades and building upward toward a full high school program over the following years. That relatively recent founding means the upper grades are still maturing, and the enrollment pattern reflects this: the school draws its largest cohorts in the middle school grades, with the high school grades considerably smaller as the school continues to grow into its full grade span. The senior class is the smallest by a wide margin, which is what you would expect from a school that has only recently added its upper grades rather than from any attrition signal.
What sets Alturas apart in the local landscape is its curriculum. Publicly reported information identifies it as the only authorized International Baccalaureate World School in eastern Idaho. That is a distinctive offering for families in the Idaho Falls area who are seeking an IB education, and it differentiates Alturas from other secondary options in the region. For families comparing charter and traditional public schools, the IB framework is the central feature to weigh. It carries a particular pedagogical orientation, one that emphasizes inquiry and interdisciplinary learning, and it is worth understanding whether that approach fits your child before choosing this school.
On state assessments, the most recent ISAT results show a pattern worth examining. In English language arts, proficiency rates across the three tested middle school grades sit in a comfortable range, with the seventh grade posting the strongest result and the sixth and eighth grades close behind. A majority of tested students in each of those grades met or exceeded proficiency. In mathematics, the picture is more mixed. Sixth and eighth grade proficiency rates are lower, with roughly half of tested students reaching proficiency, while seventh grade is stronger. Eighth grade science results land in a comparable middle range. The ELA results are a clear relative strength. The math results are softer, and a parent may want to look into how the school supports math instruction and intervention at those grade levels.
Several pieces of information a parent might look for were not available in the data we reviewed. Free or reduced-price lunch counts, special education enrollment, and English learner figures were all missing, so we cannot characterize the school's socioeconomic mix or the scope of its services for those populations. No locale brief or community economic context was provided, so we cannot describe the surrounding housing market or neighborhood setting. No graduation rate was reported, which is consistent with the school still being young and its first senior class being very small. High school level state assessment results were also absent from the data set. No civil rights data, discipline figures, course access details, staffing numbers, or program offerings beyond the IB designation were available, so those dimensions remain undescribed rather than assumed.
The student body is predominantly white, with a small Hispanic population and a very small number of students from other racial or ethnic backgrounds. The overall enrollment is modest for a secondary school, which is typical of a charter school in its early years and one that offers a specialized program. Families considering Alturas should weigh the IB curriculum and the relatively small school environment against the limited data currently available on outcomes for the upper grades. The academic results in English language arts are encouraging, and the math results are worth a closer conversation with the school. As the school fills out its high school and produces its first full graduating classes, a clearer picture of upper-grade performance and postsecondary outcomes will emerge. For now, the IB distinction and the middle-grade ELA performance are the strongest signals in the data.
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