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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	11,304	2430.9	− 2436	−5.1	× 22 / 121	−0.9
4	11,306	2452.6	− 2485	−32.4	× 25 / 121	−6.7
5	11,308	2485.4	− 2528	−42.6	× 18 / 121	−6.3
6	11,310	2485.0	− 2552	−67	× 22 / 121	−12.2
7	11,312	2501.0	− 2567	−66	× 20 / 121	−10.9
8	11,314	2473.9	− 2586	−112.1	× 14 / 121	−13
Sum, rounded to a whole point						−50

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,312	2403.6	− 2436	−32.4	× 14 / 94	−4.8
4	10,314	2470.1	− 2485	−14.9	× 16 / 94	−2.5
5	10,317	2453.7	− 2528	−74.3	× 18 / 94	−14.2
6	10,318	2464.6	− 2552	−87.4	× 22 / 94	−20.5
7	10,321	2468.8	− 2567	−98.2	× 24 / 94	−25.1
Sum, rounded to a whole point						−67

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,641	2427.8	− 2436	−8.2	× 13 / 88	−1.2
4	10,643	2436.1	− 2485	−48.9	× 16 / 88	−8.9
6	10,646	2458.2	− 2552	−93.8	× 17 / 88	−18.1
7	10,648	2518.3	− 2567	−48.7	× 21 / 88	−11.6
8	10,650	2477.7	− 2586	−108.3	× 21 / 88	−25.8
Sum, rounded to a whole point						−66

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	10,654	2458.7	− 2485	−26.3	× 19 / 79	−6.3
5	10,657	2417.9	− 2528	−110.1	× 15 / 79	−20.9
6	10,658	2516.9	− 2552	−35.1	× 13 / 79	−5.8
7	10,661	2497.4	− 2567	−69.6	× 17 / 79	−15
8	10,662	2529.5	− 2586	−56.5	× 15 / 79	−10.7
Sum, rounded to a whole point						−59

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,729	2402.5	− 2436	−33.5	× 20 / 80	−8.4
5	10,731	2426.6	− 2528	−101.4	× 12 / 80	−15.2
6	10,732	2456.5	− 2552	−95.5	× 17 / 80	−20.3
7	10,733	2491.5	− 2567	−75.5	× 19 / 80	−17.9
8	10,734	2473.0	− 2586	−113	× 12 / 80	−17
Sum, rounded to a whole point						−79

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,585	2405.2	− 2436	−30.8	× 18 / 94	−5.9
4	10,586	2447.8	− 2485	−37.2	× 19 / 94	−7.5
5	10,587	2460.6	− 2528	−67.4	× 27 / 94	−19.4
7	10,589	2581.8	− 2567	14.8	× 17 / 94	2.7
8	10,590	2534.6	− 2586	−51.4	× 13 / 94	−7.1
Sum, rounded to a whole point						−37

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,724	2407.8	− 2436	−28.2	× 21 / 118	−5
4	10,725	2434.3	− 2485	−50.7	× 18 / 118	−7.7
5	10,726	2430.4	− 2528	−97.6	× 14 / 118	−11.6
6	10,727	2486.3	− 2552	−65.7	× 28 / 118	−15.6
7	10,728	2452.5	− 2567	−114.5	× 11 / 118	−10.7
8	10,729	2534.9	− 2586	−51.1	× 26 / 118	−11.3
Sum, rounded to a whole point						−62

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,716	2320.5	− 2436	−115.5	× 15 / 94	−18.4
4	10,717	2440.6	− 2485	−44.4	× 20 / 94	−9.4
5	10,718	2410.9	− 2528	−117.1	× 14 / 94	−17.4
7	10,720	2472.8	− 2567	−94.2	× 25 / 94	−25.1
8	10,721	2451.2	− 2586	−134.8	× 20 / 94	−28.7
Sum, rounded to a whole point						−99

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,674	2340.0	− 2436	−96	× 14 / 99	−13.6
4	10,675	2341.1	− 2485	−143.9	× 12 / 99	−17.4
5	10,676	2443.5	− 2528	−84.5	× 15 / 99	−12.8
6	10,677	2422.2	− 2552	−129.8	× 22 / 99	−28.8
7	10,678	2430.7	− 2567	−136.3	× 14 / 99	−19.3
8	10,679	2456.3	− 2586	−129.7	× 22 / 99	−28.8
Sum, rounded to a whole point						−121

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,651	2335.0	− 2436	−101	× 21 / 105	−20.2
4	10,652	2385.8	− 2485	−99.2	× 13 / 105	−12.3
5	10,653	2364.6	− 2528	−163.4	× 12 / 105	−18.7
6	10,654	2451.8	− 2552	−100.2	× 13 / 105	−12.4
7	10,655	2443.0	− 2567	−124	× 27 / 105	−31.9
8	10,656	2456.0	− 2586	−130	× 19 / 105	−23.5
Sum, rounded to a whole point						−119

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −50, −67, −66, −59, −79, −37, −62, −99, −121, −119 → −75.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 17 · 2016→2017: 1 · 2017→2018: 7 · 2018→2019: 20 · 2019→2021: 42 · 2021→2022: 25 · 2022→2023: 37 · 2023→2024: 22 · 2024→2025: 2 → average 19.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 19.2 × 2.66 = 51.1. Upper limit −24.8, lower limit −127.

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.