Volta Elementary: math

The shaded band is this school's normal range. If nothing about how it works changes, nearly every future year should land inside it. Zero means the typical student just meets the state standard. The small numbers under the years are how many students were tested.

Measured against the grade bars

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 6.

All students

3rd The average 3rd grader scores 42 points under the grade 3 bar. 2394 vs. 2436.
4th The average 4th grader scores 47 points under the grade 4 bar. 2438 vs. 2485.
5th The average 5th grader scores just under the grade 4 bar. 2483 vs. 2485. The 5th-grade bar is 2528.
6th The average 6th grader scores 21 points under the grade 4 bar. 2464 vs. 2485. The 6th-grade bar is 2552.

Students fluent in English

Math with English out of the way. Includes students who have only ever spoken English.

Grade bars 3rd 41 students 33 points under the grade 3 bar. 4th 52 students 28 points under the grade 4 bar.

English learners

Students leave this group as they become fluent, so its average stays low even where they learn well.

Grade bars 3rd 15 students 67 points under the grade 3 bar. 4th 16 students 59 points under the grade 3 bar.

the group's average that grade's own bar the distance between

2026 results. "Meets standard" is the state's mark for being on track for that grade. The state leaves out any group of ten students or fewer, so a grade may be missing from the charts.

Step 1 · Each year's result

For each grade tested, take the average (mean) scale score from the California Department of Education's results file, and subtract the lowest score that counts as "Standard Met" for that grade. That is the grade's distance from standard. Weight each grade by its share of the students tested, then add the grades up. Grades where the state hides the average because ten or fewer students tested are left out entirely.

2015 from sb_ca2015_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,294	2438.3	− 2436	2.3	× 52 / 228	0.5
4	44,295	2464.0	− 2485	−21	× 59 / 228	−5.4
5	44,298	2490.2	− 2528	−37.8	× 57 / 228	−9.5
6	44,299	2501.9	− 2552	−50.1	× 60 / 228	−13.2
Sum, rounded to a whole point						−28

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,993	2451.0	− 2436	15	× 62 / 244	3.8
4	40,995	2464.9	− 2485	−20.1	× 66 / 244	−5.4
5	40,998	2503.4	− 2528	−24.6	× 56 / 244	−5.6
6	40,999	2510.0	− 2552	−42	× 60 / 244	−10.3
Sum, rounded to a whole point						−18

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	42,003	2422.1	− 2436	−13.9	× 56 / 243	−3.2
4	42,004	2497.4	− 2485	12.4	× 62 / 243	3.2
5	42,006	2504.7	− 2528	−23.3	× 64 / 243	−6.1
6	42,008	2514.3	− 2552	−37.7	× 61 / 243	−9.5
Sum, rounded to a whole point						−16

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	42,024	2409.5	− 2436	−26.5	× 61 / 247	−6.5
4	42,025	2474.1	− 2485	−10.9	× 57 / 247	−2.5
5	42,028	2492.8	− 2528	−35.2	× 66 / 247	−9.4
6	42,030	2511.6	− 2552	−40.4	× 63 / 247	−10.3
Sum, rounded to a whole point						−29

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	42,166	2410.6	− 2436	−25.4	× 69 / 253	−6.9
4	42,167	2464.6	− 2485	−20.4	× 59 / 253	−4.8
5	42,168	2505.9	− 2528	−22.1	× 59 / 253	−5.2
6	42,169	2528.8	− 2552	−23.2	× 66 / 253	−6.1
Sum, rounded to a whole point						−23

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,935	2386.2	− 2436	−49.8	× 65 / 276	−11.7
4	41,936	2438.3	− 2485	−46.7	× 72 / 276	−12.2
5	41,937	2433.9	− 2528	−94.1	× 71 / 276	−24.2
6	41,938	2477.7	− 2552	−74.3	× 68 / 276	−18.3
Sum, rounded to a whole point						−66

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,960	2390.1	− 2436	−45.9	× 65 / 262	−11.4
4	41,961	2424.2	− 2485	−60.8	× 65 / 262	−15.1
5	41,962	2459.7	− 2528	−68.3	× 65 / 262	−16.9
6	41,963	2448.0	− 2552	−104	× 67 / 262	−26.6
Sum, rounded to a whole point						−70

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,791	2409.9	− 2436	−26.1	× 43 / 241	−4.7
4	41,792	2432.7	− 2485	−52.3	× 67 / 241	−14.5
5	41,793	2447.7	− 2528	−80.3	× 61 / 241	−20.3
6	41,794	2445.9	− 2552	−106.1	× 70 / 241	−30.8
Sum, rounded to a whole point						−70

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,550	2397.5	− 2436	−38.5	× 64 / 240	−10.3
4	41,551	2458.3	− 2485	−26.7	× 41 / 240	−4.6
5	41,552	2446.1	− 2528	−81.9	× 75 / 240	−25.6
6	41,553	2485.9	− 2552	−66.1	× 60 / 240	−16.5
Sum, rounded to a whole point						−57

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,456	2393.9	− 2436	−42.1	× 56 / 237	−9.9
4	41,457	2438.0	− 2485	−47	× 68 / 237	−13.5
5	41,458	2482.6	− 2528	−45.4	× 41 / 237	−7.9
6	41,459	2464.3	− 2552	−87.7	× 72 / 237	−26.6
Sum, rounded to a whole point						−58

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −28, −18, −16, −29, −23, −66, −70, −70, −57, −58 → −43.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 2 · 2017→2018: 13 · 2018→2019: 6 · 2019→2022: 43 · 2022→2023: 4 · 2023→2024: 0 · 2024→2025: 13 · 2025→2026: 1 → average 10.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.2 × 2.66 = 27.1. Upper limit −16.4, lower limit −70.6.

Why 2.66? It is the standard factor from quality control, the work of Walter Shewhart and W. Edwards Deming. It turns "how much the result typically changes in a year" into "how far it can wander by chance alone".

Years with no result (no state tests were given in spring 2020) are skipped: the year-to-year change runs from the last year with a result to the next one.

Step 3 · Free or reduced-price meals

The share of enrolled students eligible for free or reduced-price meals. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.