Sage International School of Boise, Boise ID

Original Research by School Decision on Sage International School of Boise

Sage International School of Boise is a public charter school serving students from kindergarten through twelfth grade, all on a single campus along Parkcenter Boulevard in Boise. The full K-through-12 span under one roof is a defining feature. Families who enroll early can keep a child here from the first days of kindergarten through high school graduation, and the continuity that offers is something most standalone elementary, middle, or high schools cannot match. Publicly reported information references International Baccalaureate programming at the school, though the data sections available here do not include course catalogs or program rosters to confirm the full breadth of offerings.

The enrollment is moderate for a K-12 charter, with relatively even cohorts across the elementary grades and a gradual expansion through the middle years. The high school grades are noticeably smaller, which may reflect natural attrition as students move up or a design choice to keep upper grades intimate. The student body is predominantly white, with smaller shares of Hispanic, Asian, and multiracial students, and very small proportions of Black, Native American, and Pacific Islander students. Free-or-reduced-price-lunch data was not available, nor were IEP or English-learner counts, so the picture of economic diversity and special-population services is incomplete from this source alone.

On Idaho's state assessments, the most recent results show a school that generally performs well in English language arts, with proficiency rates across the tested elementary and middle grades sitting in a solid range and peaking in the upper middle grades. Math results tell a more mixed story. The earlier elementary grades show stronger proficiency, but there is a visible dip as students move into the upper elementary and early middle grades before partial recovery in seventh and eighth. Science was tested only at certain grade levels, with one result in a moderate range and the other suppressed for privacy. No high school state assessment data was included in what we received, so the academic picture here is limited to the tested elementary and middle grades.

Several categories of information that parents often ask about were absent from the data. There is no graduation rate reported here, no course-access or advanced-coursework listing, no discipline or staffing data, and no attendance figures. The school's Title I status was also not provided. A parent weighing this school for high school specifically may want to look into graduation outcomes, college-acceptance patterns, and the upper-grade curriculum directly with the school, since those pieces do not appear in this data set.

Boise itself is Idaho's capital and largest city, a place where state government, technology employers, and Boise State University shape the civic and economic life. The school sits in a city with major employers including Micron Technology, Albertsons, and the Simplot Company, and a regional economy that has drawn sustained population growth to the broader Treasure Valley. The Boise River Greenbelt, downtown cultural institutions, and the foothills give the city a mix of outdoor access and urban amenities. Housing in the school's zip code sits above both the state and national benchmarks, and rents have risen appreciably over the past year, so families moving into the area should expect a cost of living that reflects Boise's growth trajectory.

The school is its own charter district, which means governance and accountability run through its own board rather than a traditional district central office. The district brief search did not surface specific parent-relevant changes with confirmed lasting impact beyond references to its IB programming and enrollment.

What the data supports is a picture of a K-12 charter with solid English language arts results across the tested grades, math performance that varies by grade level, and a continuity of placement from kindergarten through senior year that is unusual in the public school arena. The gaps in the available data, particularly around high school outcomes, economic diversity, and program specifics, mean this is a school where direct conversation with the administration would help a parent fill in what the numbers here do not yet show.

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Academic performance

State test results and graduation outcomes.

Graduation rate (ACGR)

80-89%Cohort of 47 students · Class of 2021

The federal source publishes a banded range instead of an exact rate when the graduating cohort is small enough that an exact number could risk identifying individual students.

How this school compares to all schools in this state

Each dot is one school’s SY 2020-21 graduation rate, binned by integer rate. Taller columns mean more schools at that rate. This school is highlighted.

219 schools plotted. 4 additional schools' rates are federally suppressed and not shown. Data: EDFacts SY 2020-21.

Math

Grade 364%

School 64% · District 64%

▲ 11 pts above state median · ▲ 3 pts above county median

Grade 464%

School 64% · District 64%

▲ 14 pts above state median · ▲ 2 pts above county median

Grade 553%

School 53% · District 53%

▲ 8 pts above state median · ▼ 2 pts below county median

Grade 648%

School 48% · District 48%

▲ 5 pts above state median · ▼ 7 pts below county median

Grade 752%

School 52% · District 52%

▲ 9 pts above state median · ▼ 4 pts below county median

Grade 859%

School 59% · District 59%

▲ 15 pts above state median · ▲ 3 pts above county median

English language arts

Grade 365%

School 65% · District 65%

▲ 16 pts above state median · ▲ 3 pts above county median

Grade 470%

School 70% · District 70%

▲ 17 pts above state median · ▲ 4 pts above county median

Grade 568%

School 68% · District 68%

▲ 12 pts above state median · ▼ 1 pts below county median

Grade 655%

School 55% · District 55%

▲ 2 pts above state median · ▼ 13 pts below county median

Grade 772%

School 72% · District 72%

▲ 16 pts above state median · even with county median

Grade 871%

School 71% · District 71%

▲ 15 pts above state median · ▲ 8 pts above county median

Science

Grade 557%

School 57% · District 57%

▲ 11 pts above state median · ▲ 2 pts above county median

This schoolTHE SAGE INTERNATIONAL SCHOOL OF BOISE A PUBLIC CHARTER SCH, same grade

Graduation rate (ACGR) reflects the federally published Adjusted Cohort Graduation Rate for the most recent year available. We refresh this data annually at the close of each academic year in June. The federal source publishes a banded rate (for example, "90-94%") instead of an exact number for cohorts small enough to risk identifying individual students. The state distribution chart, where shown, plots every school in the state with a published rate or band; schools whose rate is federally suppressed are excluded. Where the federal source publishes a band rather than an exact rate, the school is placed within its band using a stable, ID-derived offset, so its position is consistent across visits.