ExploreMapCompareBlogSign in

Charter elementary school

Stone Bridge

Napa, CA · Grades TK-8 · 278 students · Napa Valley Unified

No single number tells this school's story. Here's the honest picture.

28% of tested students are Proficient or Advanced in English and 20% in math. Explore the evidence alongside the opportunities your child would use.

SchoolScope archetype

Culture First

What this means for your family

Ask whether the low absenteeism and suspension numbers come from what the school does or from the community it serves — both can produce the same numbers, and only a visit tells you which.

How archetypes are assigned →

Contact

Math

20%

Grades 3 & 5 · Proficient or Advanced

English

28%

Grades 3 & 5 · Proficient or Advanced

Students

278

Total enrollment

Chronic absence

14%

Students absent 10% or more of school days

What are you trying to decide?

The overall score is a starting point.

Look at subject results, trends and student groups, then consider the opportunities your child would use.

View school performance →

Academic performance

What do the results tell us?

2025 results · Grades 3 & 5 · weighted by students tested within each subject.

Proficient or Advanced combines Levels 3 and 4, formerly Standard Met and Standard Exceeded. California changed the names for 2025–26; the cut scores did not. About the labels →

Share at Proficient or Advanced

0%25%50%75%100%2019: 40%2022: 18%2023: 15%2024: 27%2025: 20%2019: 60%2022: 38%2023: 32%2024: 32%2025: 28%201920222023202420250%25%50%75%100%2019: 40%2022: 18%2023: 15%2024: 27%2025: 20%2019: 60%2022: 38%2023: 32%2024: 32%2025: 28%20192022202320242025
● Math┄ English

Gaps in the lines mark years without annual results.

Exact annual results
YearMathEnglish
201940%60%
202218%38%
202315%32%
202427%32%
202520%28%

Each year describes that year’s tested students. Changes between years do not follow the same children over time. Cohort-growth evidence, when available, is labeled separately below.

Annual results and the full academic record
Is it getting better · CAASPP 2019 to 2025

Slipped from the 61st to the 42nd percentile since 2019.

Most rating sites would stop at “31% proficient” and call it done. Stone Bridge deserves a closer read. It sits at the 42nd percentile of 5,721 California elementary schools — but the ranking is the least interesting thing on this page.

As a charter, Stone Bridge enrolls by application rather than address. That changes how you get in, but it doesn't change the score.

170 tested · 3 of 3 grades published · no cohort tracked

Stone Bridge scores 33 of 100 on SchoolScope's Scope Score — the 42nd percentile of 5,721 California elementary schools (CDE CAASPP 2025).

This school hasn't fully recovered from the pandemic: 31% meet the standard today, versus 50% in 2019 — a gap worth asking about on a visit.

Percentile among 5,721 elementary schools statewide
Year detailsYear2019 · 61st percentile · Scope Score 42 of 1002022 · 35th percentile · Scope Score 26 of 1002023 · 23rd percentile · Scope Score 22 of 1002024 · 42nd percentile · Scope Score 33 of 1002025 · 42nd percentile · Scope Score 33 of 100
ELAYellow(Increased)MathOrange(Declined)
ShowHide the by-grade tables, year by year
ELA — % met or exceeded, by grade
Grade20192022202320242025
Grade 3—24%37%20%27%
Grade 4—37%33%21%60%
Grade 560%52%28%43%30%
Grade 670%70%48%34%41%
Grade 768%74%70%58%46%
Grade 880%76%50%81%52%
Math — % met or exceeded, by grade
Grade20192022202320242025
Grade 3—24%17%33%17%
Grade 4—19%23%21%27%
Grade 540%11%14%20%23%
Grade 652%50%20%31%38%
Grade 761%65%63%27%36%
Grade 855%68%52%70%26%
Where students land · CAASPP 2024–25

One in four of students here meet the standard. One in ten clear it by a lot.

ELA42% met or exceeded
Exceeded 15%Met 28%Nearly Met 30%Not Met 28%
Math28% met or exceeded
Exceeded 11%Met 17%Nearly Met 37%Not Met 35%
Exceeded Met Nearly Met Not Met
California elementary schools · average21% exceeded · 43% met or exceeded
This school against the California average
2019–2025 trend · CDE CAASPP
Scope% Exceeded% Met+GrowthAbsenceSuspension
This school3312%31%—13.7%0.2%
CA average · Elementary School3921%43%—17.9%1.6%
This schoolCA avg
Scope3339
% Exceeded12%21%
% Met+31%43%
Growth——
Absence13.7%17.9%
Suspension0.2%1.6%
California’s growth results and student groups
State growth model · CDE growth model 2024–25

California's own growth model places it near the 86th percentile of elementary schools.

Context — never part of the Scope Score

California runs its own growth model — it follows individual children in grades 4 through 8 and compares each one against a prediction from their own prior scores. On that measure this school sits well above the middle of California elementary schools in reading and math together. We show it; we don't score it.

— pts vs expected is scale-score points above or below what California's model predicted for these same children from their own prior-year scores. It is not a percentage and not a percent of anything. A typical California elementary school lands at +2 in reading, and the middle half of them fall between −5 and +9 — the spread is wide, so read the rank, not the sign. CDE blends two consecutive years into each published figure, so adjacent years share input data and no year-over-year trend can honestly be drawn from them. It covers grades 4-8 only, and it is not part of the Scope Score — we assessed it and left it out: it tracks school demographics roughly three times as strongly as our own growth measure does, and one published year is not enough to test how stable it is.

California's growth model, ranked against the schools it scores
State model · readingmatched students, grades 4-8California growth model, reading: +13 scale-score points versus the state's expectation, 86th percentile of 7,519 reported schools.86th pctile · +13 pts
State model · mathmatched students, grades 4-8California growth model, math: +15 scale-score points versus the state's expectation, 86th percentile of 7,518 reported schools.86th pctile · +15 pts
this school| the tick is the middle of the California field

Students & opportunity

Who shares in the school’s results?

Who it works for · CAASPP 2024–25

How every group of students does here

At Stone Bridge in Napa, 48.3% of white students met or exceeded the ELA standard in 2025, compared to 62.7% district-wide and 61.8% statewide. Stone Bridge trails its district average for white students by 14.4 percentage points in ELA. Other subgroups: White students (31.9% Math proficient). Data source: California Department of Education, CAASPP 2024-25. 116 students tested.

Met or exceeded · reading and math combined
All students at this school: 35% met or exceeded
All StudentsAll Students: this school 35%, district —, state 43%35%
WhiteWhite: this school 40%, district 56%, state 56%40% · +5 vs school
MaleMale: this school 29%, district 36%, state 42%29% · −6 vs school
FemaleFemale: this school 45%, district 38%, state 44%45% · +10 vs school

7 of 11 student groups here are too small to report — a privacy protection, not a gap.

this school district, same group California, same group
ShowHide Student-group results by grade
Student-group results by grade

Results compare different grade groups in the same year, relative to the lowest tested grade. They do not track the same children over time. Groups with fewer than 10 tested students per grade are not shown.

ShowHide California's growth model by student group
The state's growth model, by student group

California follows these children individually and predicts each one's score from their own prior year. Each row is read against the same group at a typical California elementary school — not against zero, and not against this school's all-students figure, because the state's expectation already differs by group.

Reading
English Only122 studentsEnglish Only, reading: +13 scale-score points versus expectation, against +3 for the same group at a typical California elementary school, 122 students.+13 pts · +10 vs typical
White101 studentsWhite, reading: +15 scale-score points versus expectation, against +5 for the same group at a typical California elementary school, 101 students.+15 pts · +10 vs typical
Math
English Only122 studentsEnglish Only, math: +15 scale-score points versus expectation, against +1 for the same group at a typical California elementary school, 122 students.+15 pts · +14 vs typical
White101 studentsWhite, math: +20 scale-score points versus expectation, against +5 for the same group at a typical California elementary school, 101 students.+20 pts · +15 vs typical
this school typical California elementary school, same group| the centre tick is 0 = as predicted

— 3 more groups are reported here with between 11 and 29 students. We hold those back on purpose: at that size the figure swings about 17 points on its own, and a quarter of such groups land past the state's top or bottom cut point by chance alone. They are listed with their student counts in the data appendix. — A group not listed at all had fewer than 11 students with a growth score, so California published nothing for it here. That is a privacy protection, not a judgment about those students. — Context only. None of this enters the Scope Score.

The daily experience

What is it like to be a student here?

Students per teacher

Student–teacher ratio is a schoolwide staffing measure, not an average class size.

The people teaching · CDE staffing 2024–25

About 28 students for every teacher here.

Context — never part of the Scope Score

Students per teacher28 · district 24
Teaching staff11 teachers
Avg. experience13.6 years
Fully credentialed57%
Intern / emergency permit10.8%
PrincipalLisa Meyers
ShowHide what the district pays
Teacher salary schedule$69,598 – $126,977
Principal salary$164,516 – $178,111
Superintendent salary$386,157

Pay is set by the district, not the school.

Attendance & discipline · 2024–25

Kids here show up more, and get suspended less, than the state average.

Chronic absenteeismChronic absenteeism: this school 13.7%, district 18.6%, state 17.9%13.7% · −4.2pp vs state
Suspension rateSuspension rate: this school 0.2%, district —, state 1.6%0.2% · −1.4pp vs state
This schoolDistrictCalifornia

Resources & neighborhood

What sits behind the school experience?

Explore school spending and the district budget
What gets spent · FY 2024–25

Its district spends $12,008 per student, less than the California average.

Context — never part of the Scope Score

The district's current expense of education per student, from CDE's annual SACS filing — the freshest district spending figure the state publishes.

Per-pupil spendingPer-pupil spending: $12,008, CA average $14,491$12,008 · district average
District current expense · FY 2024–25$17,390 per student
District averageCalifornia
Where the district's dollars go · FY 2024–25 · CDE SACS
Instruction 59%Instruction support 12%Student services 9%Administration 8%Buildings & maintenance 11%Other 1%

District-level, from the district's own SACS general-ledger filing — school-by-school breakdowns aren't published by the state.

ShowHide the district's spending year by year
district detail, 2016–2020 — the newest published
2020$12,008 per pupil
2019$11,856 per pupil
2018$12,313 per pupil
2017$11,122 per pupil
2016$11,221 per pupil

Source: NCES F-33 · Full district breakdown →

The neighborhood · ACS 2024

One in five of students here qualify for free or reduced lunch, versus three in five statewide.

Context — never part of the Scope Score

Worth knowing

Transitional kindergarten is offered here — confirmed by actual Census Day enrollment, not just the listed grade span.

On the state's science test (CAST), 28% met or exceeded the standard — science is tested in grades 5 and 8 and once in high school, and it never enters the Scope Score.

Hispanic or Latino20.1% · district 58.6% · CA 56.1%
White61.9% · district 24.2% · CA 19.9%
Asian2.5% · district 2.8% · CA 10.2%
Black1.1% · district 2.4% · CA 4.8%
Other14.4% · district 12.0% · CA 9.0%
Free or reduced lunch18.4% · CA 64%
Median income$113K · CA $85K
Median home value$891K · CA $659K
Bachelor's degree+40% · CA 35%
ZIP population63,657
Median age45 years

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2024) · ZIP-level

Culture & philosophy

What is the school’s approach?

School-stated approach · questions for your visit

Look beyond the brochure

A source-reviewed culture summary is not available for this profile yet. Ask how teaching, student support and family communication work day to day.

Read the school’s own website ↗

Family voices

What would you want another family to know about the daily experience here?

Ask a current family: “When your child needs help, how does the school respond?”

Educator voices

What should families understand about teaching, support and the school community?

Ask an educator: “How do you adapt a typical day for children with different needs?”

Bring these questions on a visit →

Compare nearby schools

What are the alternatives?

Compare schools serving the same grade stage. Private schools have no comparable state-test score.

2025 · elementary schools · combined reading and math measures. Percentiles compare schools within their enrollment group.

Private options →
SchoolTypePerformance bandAdvancedProficient or AdvancedDistanceSelect
Stone BridgeCharterDeveloping12%31%School being viewed
Vichy ElementaryPublicStrong37%68%2.8 mi
Alta Heights ElementaryPublicSolid17%41%1.5 mi
Phillips ElementaryPublicNeeds Support7%22%1.3 mi
Open the comparison tool →
More nearby public and private options
Your other options

Your other options

Nearby public schools across grade levels, plus private options within 10 miles.

All schools in Napa →

Private schools do not receive a Scope Score or statewide ranking on SchoolScope.

10 private schools within 10 miles
Not scored
What should I check before applying?
District public
Confirm the attendance boundary and any permit options.
Charter
Check applications, priorities and deadlines with each school.
Private
Confirm admission requirements, tuition and financial aid.

Moving & enrollment

Which schools could serve my child?

Check enrollment with this charter school

Ask the school about applications, priorities and deadlines for your child’s grade.

School website →

Schools across the K–12 journey

Elementary · K–5

Middle · 6–8

High school · 9–12

No school established for this stage.

Source: proximity. Schools are grouped by grade stage. Nearby schools are not confirmed feeder links or address assignments. Verify the current path and eligibility with the district.

Charter enrollment details

Plan your next step

What should I do next?

Worth a school visit

Ask what the school is working on next. Strong numbers tell you where a school is, not where it's going.

  • Ask whether the tour can step into a working classroom — watch how the teacher handles a student who's stuck.
  • Ask to tour while school's in session, and notice how hallways and transitions feel — culture shows up between classes, not just in them.
  • Ask how the school communicates with families when a child starts to struggle.
  • Ask what a typical day looks like for a new student in the first few weeks.
Questions

Frequently asked questions

Is Stone Bridge a good elementary school?
Stone Bridge has a Scope Score of 33 out of 100, placing it in the 42nd percentile of California elementary schools and ranked #3,320 statewide. 11.7% of students exceeded the state standard on the 2025 CAASPP assessment, which is 9.7 percentage points below the California average of 21.4%. The Scope Score weights 6 dimensions for elementary schools: exceeded standard (42%), met or exceeded (proficient) (23%), grade 3-to-5 growth (20%), chronic absenteeism (5%), suspension rate (5%), and ELPAC English Learner proficiency (5%). Data source: California Department of Education CAASPP 2025, analyzed by SchoolScope.
What are Stone Bridge's CAASPP test scores?
On the 2025 CAASPP Smarter Balanced Assessment, 30.6% of students at Stone Bridge met or exceeded the state standard in ELA and Math combined, and 11.7% exceeded it. The gap between those numbers matters: 18.9% of students are at the proficiency floor, while 11.7% went beyond it. Most rating sites report only the combined "proficient" number. SchoolScope surfaces the exceeded-vs-met split because it shows how many students go beyond the standard rather than only meeting it. 180 student-subject combinations were assessed.
How does Stone Bridge rank in California?
Stone Bridge ranks #3,320 among California elementary schools by Scope Score, placing it in the 42nd percentile. This ranking is based on a weighted composite of 2025 CAASPP test performance (exceeded and met rates), grade-level growth (Grade 3 to grade 5 growth), chronic absenteeism, and suspension rate. Unlike single-number ratings, the Scope Score shows what drives the ranking so parents can decide what matters most to their family. See full methodology.
What is the attendance and school culture like at Stone Bridge?
13.7% of students at Stone Bridge are chronically absent (missing 10% or more of school days), which is better than the California average of 17.9%. The suspension rate is 0.2%, indicating a low-discipline-incident environment. SchoolScope includes these culture metrics in the Scope Score because they reflect day-to-day school experience in ways test scores alone cannot.
How does Stone Bridge compare to other schools in Napa?
Stone Bridge scores 33/100 (42nd percentile) among California elementary schools. To compare with nearby schools, SchoolScope shows the same metrics side by side: exceeded rate, proficiency, growth trajectory, and school culture indicators. The school serves 278 students. Use the schools in Napa page or the map view to compare all elementary schools nearby.
How does Stone Bridge serve low-income and underrepresented students?
At Stone Bridge in Napa, 48.3% of white students met or exceeded the ELA standard in 2025, compared to 62.7% district-wide and 61.8% statewide. Stone Bridge trails its district average for white students by 14.4 percentage points in ELA. Other subgroups: White students (31.9% Math proficient). Data source: California Department of Education, CAASPP 2024-25. 116 students tested. SchoolScope shows disaggregated test scores by demographic subgroup so you can see how a school performs for your child's specific group — not just the school-wide average. Subgroup data is context, not part of the Scope Score: we don't penalize schools for who they serve. See our equity approach.

Use the published evidence to prepare questions, then verify fit and access with the school.

Behind the evidence

Inspect the full record

Public sources, visible methods and the underlying school record. Source years and limitations stay attached to the evidence.

How the Scope Score is calculated

On a narrow screen, scroll the table sideways to see the state comparison and weights.

What the score weighs · CAASPP 2024–25

The 5 things our score weighs

What the score weighs
What we weighHereStateWeight
Exceeded standard11.7%21.4%42%
Met or exceeded30.6%42.7%23%
Chronic absenteeism13.7%17.9%5%
Suspension rate0.2%1.6%5%
Grade gap (G3→G5, different students)+5.0pp-2.9pp—

Source CAASPP 2025 · California Department of Education. Measures test performance, attendance, and climate — not arts, community, or your kid. How the score is built

A closer look at the evidence

Stone Bridge: reading the evidence

Stone Bridge posts 31% meeting the standard and 11.7% exceeding it, against 43% and 21.4% statewide. The gaps and the bright spots below are the real read.

Subject proficiency describes tested students, while graduation describes a graduating cohort. These figures are not successive stages followed by the same students.

Ask whether the low absenteeism and suspension numbers come from what the school does or from the community it serves — both can produce the same numbers, and only a visit tells you which.

Explore the underlying data →
Every number: score factors, grades, student groups and downloads
Every number · For the data nerds

Every number on this page

Score factors, grade-level breakdowns, subgroup proficiency, and nearest schools.

Stone Bridge is ranked #3,320 statewide · #12 of 17 in Napa Valley Unified.

01Score factorsWeighted composite · 2024–25
Score factors
FactorSchoolStateWeight
Exceeded standard11.7%21.4%42%
Met or exceeded30.6%42.7%23%
Chronic absenteeism13.7%17.9%5%
Suspension rate0.2%1.6%5%
Grade gap (G3→G5, different students)+5.0pp-2.9ppnot scored
Exceeded standard
↓ vs CA 21.4% · index 41 · 50 = CA elementary-school midpoint
Met or exceeded
↓ vs CA 42.7% · index 41 · 50 = CA elementary-school midpoint
Chronic absenteeism
↑ vs CA 17.9% · index 57 · 50 = CA elementary-school midpoint · ▲ 0.5pp higher vs 2024
Suspension rate
↑ vs CA 1.6% · index 62 · 50 = CA elementary-school midpoint · → no change vs 2024
Grade gap (G3→G5, different students)
↑ vs CA -2.9pp
02By grade & subgroupCAASPP 2024–25 · % of tested students
ShowHide table 02 — By grade & subgroup
ELATestedEXCMETNEARNOTMET++/CA
Grade 33010%17%17%57%27%−16
Grade 43027%33%20%20%60%+15
Grade 53013%17%50%20%30%−18
Grade 62910%31%41%17%41%−5
Grade 72818%29%29%25%46%−1
Grade 8239%43%22%26%52%+6
MathTestedEXCMETNEARNOTMET++/CA
Grade 3303%13%30%53%17%−29
Grade 4307%20%43%30%27%−15
Grade 53010%13%40%37%23%−12
Grade 62917%21%34%28%38%+3
Grade 72818%18%32%32%36%+2
Grade 8239%17%43%30%26%−6

We show the grade rows CDE publishes for this school. A missing grade or dash can mean the school does not serve that grade, that we hold no valid result for it, or that the tested group was too small to report. It does not mean zero.

Science (CAST)TestedEXCMETNEARNOT
Schoolwide539%19%66%6%

CAST is tested in grades 5 and 8, then once in grade 10, 11, or 12. This row is the school's all-student aggregate. Not part of the Scope Score.

Subgroup · ELATestedMET+vs districtvs CA
White11648.3%−14−14
03Nearest elementary schoolssorted by Scope Score · Grade gap = grade 3 vs grade 5, this year, different students; Cohort growth = one school's returning cohort tracked across grades (mostly, not exactly, the same kids), in scale-score points — that's the measurement the Scope Score weights
SchoolDistScopeEXCMET+Grade gapCohort growthSusp
Stone Bridge ←—3311.7%30.6%+5.0pp—0.2%
Vichy Elementary2.8 mi5836.9%68.0%−3.2pp—0.4%
Alta Heights Elementary1.5 mi3917.1%41.2%−1.6pp—1.5%
Phillips Elementary1.3 mi257.3%21.9%−3.9pp—2.0%
California average—3921.4%42.7%−2.9pp—1.6%
04More measurescontext · not all part of the Scope Score
ShowHide table 04 — More measures
YearScopePctileRankExcMet+AbsentSuspGrade gap
20194261#214721.7%50.0%9.6%0.5%—
20222635#37006.0%27.8%19.1%0.2%+7.3pp
20232223#44075.0%25.2%27.4%0.8%-6.0pp
20243342#33327.8%26.3%13.2%0.2%+5.0pp
20253342#332011.7%30.6%13.7%0.2%+5.0pp
Grade gap = this year's grade 3 vs grade 5 result, two different sets of students, not a trend for any one child — it is not the measurement the Scope Score's growth dimension uses. See §01 above and /methodology#verdicts for the school's actual scored (cohort) growth.
NO STATEWIDE TESTING 2020–21 (COVID) · SCORE AND PERCENTILE ARE RELATIVE TO EACH YEAR'S FIELD
What we can't show
  • — Scored here as an elementary school — other grade spans appear in the data appendix.
05California growth model, by student group2025 · scale-score points vs the state's prediction · shown, never scored
ShowHide table 05 — California growth model, by student group
GroupReadingnCDE bandMathnCDE band
All Students+13134Accelerated+15134Accelerated
English Only+13122not categorised+15122not categorised
White+15101Accelerated+20101Exceptional
Students with Disabilities−129Average−629Moderate
Socioeconomically Disadvantaged+528Accelerated+1128Accelerated
Hispanic or Latino+1320Accelerated+320Average

Whole scale-score points above or below what CDE's model predicted for these same children from their own prior-year scores — not a percentage, not a percentile. Statewide a typical school lands near +1 with a spread of about 13 points either side, so read a figure against its group's own typical value, not against zero. Muted rows have fewer than 30 students with a growth score — published by CDE, held back from the narrative sections above because at that size the figure swings about 17 points on its own. “Not categorised” is CDE assigning no band — English Only, Recently Reclassified, and English Learners Only receive a value and no band, for every school in the state. It is not a missing number. Most figures blend two consecutive years, so adjacent published years share input data and no trend line can honestly be drawn across them. A group absent from this table had fewer than 11 students with a growth score and was never published. Grades 4-8 only. None of this enters the Scope Score — it is more strongly correlated with school demographics than our own growth measure, and one published year is not enough to test its reliability.

Embed this scorecard
<iframe
  src="https://schoolscope.co/embed/school/stone-bridge-8605"
  width="100%" height="210" loading="lazy"
  style="border:0;border-radius:12px"
  title="Stone Bridge — SchoolScope scorecard">
</iframe>

Free to embed with the credit link. Data updates automatically.

EXC = exceeded standard · MET+ = met or exceeded ("proficient") · Source: CA Dept. of Education · CAASPP 2024–25 · n=5,721 elementary schools · Vintages: climate subgroups 2019+2025 · district finance per its label · ACS 2022 · Data updated 2026-09-18

SchoolScope scores and verdicts are our interpretation of public California Department of Education data — independent analysis, not an official rating. How we analyze · Request a correction

Stone Bridge

Your school plan

0 of 4 steps checked

Your checklist stays in this browser. Checking a step records your progress; it does not confirm admission or enrollment.