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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
7	76,095	2479.0	− 2552	−73	× 21 / 104	−14.7
8	76,097	2482.3	− 2567	−84.7	× 28 / 104	−22.8
11	76,099	2527.4	− 2583	−55.6	× 55 / 104	−29.4
Sum, rounded to a whole point						−67

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	70,579	2506.7	− 2552	−45.3	× 15 / 78	−8.7
8	70,581	2533.9	− 2567	−33.1	× 18 / 78	−7.6
11	70,583	2551.9	− 2583	−31.1	× 45 / 78	−17.9
Sum, rounded to a whole point						−34

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	72,437	2521.5	− 2552	−30.5	× 16 / 68	−7.2
8	72,439	2518.2	− 2567	−48.8	× 13 / 68	−9.3
11	72,442	2563.9	− 2583	−19.1	× 39 / 68	−11
Sum, rounded to a whole point						−27

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	72,569	2522.7	− 2552	−29.3	× 14 / 56	−7.3
8	72,571	2535.6	− 2567	−31.4	× 21 / 56	−11.8
11	72,573	2572.8	− 2583	−10.2	× 21 / 56	−3.8
Sum, rounded to a whole point						−23

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	73,053	2585.7	− 2567	18.7	× 11 / 37	5.6
11	73,054	2614.2	− 2583	31.2	× 26 / 37	21.9
Sum, rounded to a whole point						27

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	71,547	2545.1	− 2583	−37.9	× 19 / 19	−37.9
Sum, rounded to a whole point						−38

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	73,159	2530.3	− 2567	−36.7	× 14 / 29	−17.7
11	73,160	2530.6	− 2583	−52.4	× 15 / 29	−27.1
Sum, rounded to a whole point						−45

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	73,155	2526.5	− 2567	−40.5	× 13 / 31	−17
11	73,156	2608.4	− 2583	25.4	× 18 / 31	14.7
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
11	73,150	2583.4	− 2583	0.4	× 17 / 17	0.4
Sum, rounded to a whole point						0

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	72,846	2610.2	− 2583	27.2	× 17 / 17	27.2
Sum, rounded to a whole point						27

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −67, −34, −27, −23, 27, −38, −45, −2, 0, 27 → −18.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 33 · 2016→2017: 7 · 2017→2018: 4 · 2018→2019: 50 · 2019→2021: 65 · 2021→2022: 7 · 2022→2023: 43 · 2023→2024: 2 · 2024→2025: 27 → average 26.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 26.4 × 2.66 = 70.2. Upper limit 52, lower limit −88.4.

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.