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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
11	52,438	2604.8	− 2583	21.8	× 19 / 19	21.8
Sum, rounded to a whole point						22

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	48,716	2622.1	− 2583	39.1	× 22 / 22	39.1
Sum, rounded to a whole point						39

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	50,036	2663.7	− 2583	80.7	× 15 / 15	80.7
Sum, rounded to a whole point						81

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	50,066	2604.8	− 2583	21.8	× 13 / 13	21.8
Sum, rounded to a whole point						22

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	50,246	2595.6	− 2567	28.6	× 19 / 43	12.6
11	50,247	2622.5	− 2583	39.5	× 24 / 43	22
Sum, rounded to a whole point						35

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	48,977	2687.5	− 2583	104.5	× 18 / 18	104.5
Sum, rounded to a whole point						105

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	50,152	2467.8	− 2432	35.8	× 22 / 195	4
4	50,153	2519.9	− 2473	46.9	× 22 / 195	5.3
5	50,154	2547.8	− 2502	45.8	× 26 / 195	6.1
6	50,155	2517.8	− 2531	−13.2	× 20 / 195	−1.4
7	50,156	2580.0	− 2552	28	× 24 / 195	3.4
8	50,157	2592.4	− 2567	25.4	× 29 / 195	3.8
11	50,158	2626.7	− 2583	43.7	× 52 / 195	11.7
Sum, rounded to a whole point						33

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	50,115	2534.4	− 2531	3.4	× 14 / 75	0.6
7	50,116	2536.5	− 2552	−15.5	× 14 / 75	−2.9
8	50,117	2568.6	− 2567	1.6	× 22 / 75	0.5
11	50,118	2594.3	− 2583	11.3	× 25 / 75	3.8
Sum, rounded to a whole point						2

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	49,968	2475.3	− 2473	2.3	× 12 / 92	0.3
6	49,970	2569.2	− 2531	38.2	× 11 / 92	4.6
7	49,971	2562.2	− 2552	10.2	× 18 / 92	2
8	49,972	2553.3	− 2567	−13.7	× 23 / 92	−3.4
11	49,973	2643.6	− 2583	60.6	× 28 / 92	18.4
Sum, rounded to a whole point						22

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	49,726	2568.0	− 2531	37	× 11 / 85	4.8
7	49,727	2597.5	− 2552	45.5	× 12 / 85	6.4
8	49,728	2576.7	− 2567	9.7	× 24 / 85	2.7
11	49,729	2623.5	− 2583	40.5	× 38 / 85	18.1
Sum, rounded to a whole point						32

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 22, 39, 81, 22, 35, 105, 33, 2, 22, 32 → 39.3
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: 42 · 2017→2018: 59 · 2018→2019: 13 · 2019→2021: 70 · 2021→2022: 72 · 2022→2023: 31 · 2023→2024: 20 · 2024→2025: 10 → average 37.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 37.1 × 2.66 = 98.7. Upper limit 138, lower limit −59.4.

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.