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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.

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	63,021	2349.6	− 2432	−82.4	× 56 / 239	−19.3
4	63,023	2416.0	− 2473	−57	× 54 / 239	−12.9
5	63,025	2428.4	− 2502	−73.6	× 77 / 239	−23.7
6	63,027	2476.4	− 2531	−54.6	× 52 / 239	−11.9
Sum, rounded to a whole point						−68

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,465	2370.1	− 2432	−61.9	× 71 / 189	−23.3
4	58,468	2390.6	− 2473	−82.4	× 61 / 189	−26.6
5	58,469	2455.8	− 2502	−46.2	× 57 / 189	−13.9
Sum, rounded to a whole point						−64

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,171	2338.4	− 2432	−93.6	× 61 / 179	−31.9
4	60,172	2412.0	− 2473	−61	× 61 / 179	−20.8
5	60,174	2410.7	− 2502	−91.3	× 57 / 179	−29.1
Sum, rounded to a whole point						−82

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,289	2348.4	− 2432	−83.6	× 56 / 237	−19.8
4	60,292	2365.8	− 2473	−107.2	× 66 / 237	−29.9
5	60,293	2445.7	− 2502	−56.3	× 58 / 237	−13.8
6	60,296	2431.0	− 2531	−100	× 57 / 237	−24.1
Sum, rounded to a whole point						−87

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,534	2352.5	− 2432	−79.5	× 73 / 314	−18.5
4	60,535	2386.8	− 2473	−86.2	× 59 / 314	−16.2
5	60,536	2418.8	− 2502	−83.2	× 66 / 314	−17.5
6	60,537	2477.0	− 2531	−54	× 57 / 314	−9.8
7	60,538	2476.3	− 2552	−75.7	× 59 / 314	−14.2
Sum, rounded to a whole point						−76

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,622	2343.7	− 2432	−88.3	× 71 / 378	−16.6
4	60,623	2374.7	− 2473	−98.3	× 60 / 378	−15.6
5	60,624	2377.6	− 2502	−124.4	× 61 / 378	−20.1
6	60,625	2459.3	− 2531	−71.7	× 64 / 378	−12.1
7	60,626	2468.4	− 2552	−83.6	× 62 / 378	−13.7
8	60,627	2481.0	− 2567	−86	× 60 / 378	−13.7
Sum, rounded to a whole point						−92

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,567	2317.2	− 2432	−114.8	× 62 / 400	−17.8
4	60,568	2386.1	− 2473	−86.9	× 77 / 400	−16.7
5	60,569	2394.2	− 2502	−107.8	× 63 / 400	−17
6	60,570	2404.5	− 2531	−126.5	× 63 / 400	−19.9
7	60,571	2473.3	− 2552	−78.7	× 64 / 400	−12.6
8	60,572	2479.3	− 2567	−87.7	× 71 / 400	−15.6
Sum, rounded to a whole point						−100

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,514	2335.4	− 2432	−96.6	× 60 / 355	−16.3
4	60,515	2372.9	− 2473	−100.1	× 53 / 355	−14.9
5	60,516	2396.0	− 2502	−106	× 72 / 355	−21.5
6	60,517	2454.9	− 2531	−76.1	× 56 / 355	−12
7	60,518	2431.8	− 2552	−120.2	× 60 / 355	−20.3
8	60,519	2480.0	− 2567	−87	× 54 / 355	−13.2
Sum, rounded to a whole point						−98

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,267	2334.1	− 2432	−97.9	× 69 / 383	−17.6
4	60,268	2363.0	− 2473	−110	× 59 / 383	−16.9
5	60,269	2365.2	− 2502	−136.8	× 56 / 383	−20
6	60,270	2418.1	− 2531	−112.9	× 77 / 383	−22.7
7	60,271	2457.5	− 2552	−94.5	× 59 / 383	−14.6
8	60,272	2443.8	− 2567	−123.2	× 63 / 383	−20.3
Sum, rounded to a whole point						−112

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −68, −64, −82, −87, −76, −92, −100, −98, −112 → −86.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 4 · 2016→2017: 18 · 2017→2018: 5 · 2018→2019: 11 · 2019→2022: 16 · 2022→2023: 8 · 2023→2024: 2 · 2024→2025: 14 → average 9.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.8 × 2.66 = 26.1. Upper limit −60.5, lower limit −112.7.

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.