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The shaded band is this district'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	9,203	2385.8	− 2432	−46.2	× 29 / 201	−6.7
4	9,204	2473.0	− 2473	0	× 27 / 201	0
5	9,207	2485.1	− 2502	−16.9	× 44 / 201	−3.7
6	9,209	2509.6	− 2531	−21.4	× 28 / 201	−3
7	9,210	2535.3	− 2552	−16.7	× 32 / 201	−2.7
8	9,213	2574.2	− 2567	7.2	× 41 / 201	1.5
Sum, rounded to a whole point						−15

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,283	2412.4	− 2432	−19.6	× 30 / 199	−3
4	8,285	2472.7	− 2473	−0.3	× 34 / 199	−0.1
5	8,287	2451.2	− 2502	−50.8	× 34 / 199	−8.7
6	8,288	2496.5	− 2531	−34.5	× 46 / 199	−8
7	8,290	2526.6	− 2552	−25.4	× 26 / 199	−3.3
8	8,292	2511.5	− 2567	−55.5	× 29 / 199	−8.1
Sum, rounded to a whole point						−31

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,554	2415.0	− 2432	−17	× 36 / 207	−3
4	8,556	2490.2	− 2473	17.2	× 29 / 207	2.4
5	8,559	2520.9	− 2502	18.9	× 36 / 207	3.3
6	8,561	2485.1	− 2531	−45.9	× 37 / 207	−8.2
7	8,563	2546.0	− 2552	−6	× 42 / 207	−1.2
8	8,565	2551.5	− 2567	−15.5	× 27 / 207	−2
Sum, rounded to a whole point						−9

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,588	2428.1	− 2432	−3.9	× 30 / 198	−0.6
4	8,590	2443.7	− 2473	−29.3	× 33 / 198	−4.9
5	8,593	2483.3	− 2502	−18.7	× 30 / 198	−2.8
6	8,595	2531.6	− 2531	0.6	× 36 / 198	0.1
7	8,596	2532.5	− 2552	−19.5	× 29 / 198	−2.9
8	8,599	2546.5	− 2567	−20.5	× 40 / 198	−4.1
Sum, rounded to a whole point						−15

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,638	2434.0	− 2432	2	× 29 / 180	0.3
4	8,639	2475.2	− 2473	2.2	× 32 / 180	0.4
5	8,640	2485.1	− 2502	−16.9	× 33 / 180	−3.1
6	8,641	2559.1	− 2531	28.1	× 24 / 180	3.7
7	8,642	2579.8	− 2552	27.8	× 32 / 180	4.9
8	8,643	2592.9	− 2567	25.9	× 30 / 180	4.3
Sum, rounded to a whole point						11

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,591	2381.9	− 2432	−50.1	× 40 / 175	−11.5
4	8,592	2405.9	− 2473	−67.1	× 19 / 175	−7.3
5	8,593	2464.1	− 2502	−37.9	× 36 / 175	−7.8
6	8,594	2537.8	− 2531	6.8	× 25 / 175	1
7	8,595	2530.8	− 2552	−21.2	× 25 / 175	−3
8	8,596	2556.7	− 2567	−10.3	× 30 / 175	−1.8
Sum, rounded to a whole point						−30

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,569	2371.9	− 2432	−60.1	× 25 / 149	−10.1
4	8,570	2415.3	− 2473	−57.7	× 35 / 149	−13.6
5	8,571	2442.0	− 2502	−60	× 18 / 149	−7.2
6	8,572	2494.6	− 2531	−36.4	× 29 / 149	−7.1
7	8,573	2519.6	− 2552	−32.4	× 20 / 149	−4.3
8	8,574	2543.2	− 2567	−23.8	× 22 / 149	−3.5
Sum, rounded to a whole point						−46

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,515	2373.2	− 2432	−58.8	× 32 / 173	−10.9
4	8,516	2385.8	− 2473	−87.2	× 27 / 173	−13.6
5	8,517	2446.7	− 2502	−55.3	× 38 / 173	−12.1
6	8,518	2491.6	− 2531	−39.4	× 19 / 173	−4.3
7	8,519	2543.8	− 2552	−8.2	× 34 / 173	−1.6
8	8,520	2565.7	− 2567	−1.3	× 23 / 173	−0.2
Sum, rounded to a whole point						−43

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,474	2394.5	− 2432	−37.5	× 24 / 179	−5
4	8,475	2432.6	− 2473	−40.4	× 31 / 179	−7
5	8,476	2468.5	− 2502	−33.5	× 26 / 179	−4.9
6	8,477	2501.3	− 2531	−29.7	× 39 / 179	−6.5
7	8,478	2498.7	− 2552	−53.3	× 18 / 179	−5.4
8	8,479	2558.0	− 2567	−9	× 41 / 179	−2.1
Sum, rounded to a whole point						−31

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,490	2422.9	− 2432	−9.1	× 32 / 173	−1.7
4	8,491	2417.3	− 2473	−55.7	× 30 / 173	−9.7
5	8,492	2452.2	− 2502	−49.8	× 30 / 173	−8.6
6	8,493	2494.0	− 2531	−37	× 27 / 173	−5.8
7	8,494	2529.8	− 2552	−22.2	× 32 / 173	−4.1
8	8,495	2515.5	− 2567	−51.5	× 22 / 173	−6.5
Sum, rounded to a whole point						−36

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −15, −31, −9, −15, 11, −30, −46, −43, −31, −36 → −24.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 16 · 2016→2017: 22 · 2017→2018: 6 · 2018→2019: 26 · 2019→2022: 41 · 2022→2023: 16 · 2023→2024: 3 · 2024→2025: 12 · 2025→2026: 5 → average 16.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 16.3 × 2.66 = 43.4. Upper limit 18.9, lower limit −67.9.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

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