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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	9,134	2426.7	− 2432	−5.3	× 13 / 91	−0.8
4	9,137	2490.9	− 2473	17.9	× 14 / 91	2.8
5	9,138	2554.4	− 2502	52.4	× 15 / 91	8.6
6	9,141	2549.4	− 2531	18.4	× 20 / 91	4
7	9,142	2646.9	− 2552	94.9	× 16 / 91	16.7
8	9,145	2687.3	− 2567	120.3	× 13 / 91	17.2
Sum, rounded to a whole point						49

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	8,221	2564.7	− 2473	91.7	× 15 / 87	15.8
5	8,222	2548.1	− 2502	46.1	× 16 / 87	8.5
6	8,225	2593.0	− 2531	62	× 20 / 87	14.3
7	8,226	2633.6	− 2552	81.6	× 20 / 87	18.8
8	8,228	2660.1	− 2567	93.1	× 16 / 87	17.1
Sum, rounded to a whole point						74

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,484	2526.7	− 2432	94.7	× 17 / 88	18.3
5	8,488	2593.0	− 2502	91	× 15 / 88	15.5
6	8,491	2576.1	− 2531	45.1	× 15 / 88	7.7
7	8,492	2655.9	− 2552	103.9	× 20 / 88	23.6
8	8,495	2649.0	− 2567	82	× 21 / 88	19.6
Sum, rounded to a whole point						85

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,521	2539.8	− 2432	107.8	× 13 / 85	16.5
4	8,522	2561.4	− 2473	88.4	× 18 / 85	18.7
6	8,526	2577.6	− 2531	46.6	× 16 / 85	8.8
7	8,529	2624.1	− 2552	72.1	× 17 / 85	14.4
8	8,530	2631.4	− 2567	64.4	× 21 / 85	15.9
Sum, rounded to a whole point						74

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,570	2496.7	− 2432	64.7	× 20 / 101	12.8
4	8,571	2588.2	− 2473	115.2	× 13 / 101	14.8
5	8,572	2583.6	− 2502	81.6	× 20 / 101	16.2
6	8,573	2578.9	− 2531	47.9	× 11 / 101	5.2
7	8,574	2609.9	− 2552	57.9	× 20 / 101	11.5
8	8,575	2644.6	− 2567	77.6	× 17 / 101	13.1
Sum, rounded to a whole point						74

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	8,403	2517.5	− 2473	44.5	× 26 / 96	12.1
5	8,404	2573.9	− 2502	71.9	× 17 / 96	12.7
6	8,405	2567.8	− 2531	36.8	× 19 / 96	7.3
7	8,406	2668.9	− 2552	116.9	× 22 / 96	26.8
8	8,407	2622.7	− 2567	55.7	× 12 / 96	7
Sum, rounded to a whole point						66

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,525	2539.1	− 2432	107.1	× 17 / 113	16.1
4	8,526	2511.8	− 2473	38.8	× 11 / 113	3.8
5	8,527	2557.8	− 2502	55.8	× 23 / 113	11.4
6	8,528	2556.3	− 2531	25.3	× 23 / 113	5.1
7	8,529	2612.7	− 2552	60.7	× 17 / 113	9.1
8	8,530	2585.1	− 2567	18.1	× 22 / 113	3.5
Sum, rounded to a whole point						49

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,503	2512.4	− 2432	80.4	× 18 / 108	13.4
4	8,504	2544.6	− 2473	71.6	× 17 / 108	11.3
5	8,505	2575.4	− 2502	73.4	× 11 / 108	7.5
6	8,506	2576.3	− 2531	45.3	× 24 / 108	10.1
7	8,507	2592.1	− 2552	40.1	× 23 / 108	8.5
8	8,508	2590.3	− 2567	23.3	× 15 / 108	3.2
Sum, rounded to a whole point						54

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,441	2515.2	− 2432	83.2	× 21 / 126	13.9
4	8,442	2533.6	− 2473	60.6	× 22 / 126	10.6
5	8,443	2565.4	− 2502	63.4	× 17 / 126	8.6
6	8,444	2563.2	− 2531	32.2	× 13 / 126	3.3
7	8,445	2605.3	− 2552	53.3	× 27 / 126	11.4
8	8,446	2600.6	− 2567	33.6	× 26 / 126	6.9
Sum, rounded to a whole point						55

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,404	2457.5	− 2432	25.5	× 13 / 83	4
4	8,405	2506.4	− 2473	33.4	× 19 / 83	7.6
5	8,406	2575.6	− 2502	73.6	× 20 / 83	17.7
6	8,407	2589.1	− 2531	58.1	× 12 / 83	8.4
8	8,409	2625.7	− 2567	58.7	× 19 / 83	13.4
Sum, rounded to a whole point						51

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	8,417	2475.9	− 2473	2.9	× 18 / 69	0.8
5	8,418	2555.6	− 2502	53.6	× 17 / 69	13.2
6	8,419	2586.9	− 2531	55.9	× 23 / 69	18.6
7	8,420	2653.7	− 2552	101.7	× 11 / 69	16.2
Sum, rounded to a whole point						49

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 49, 74, 85, 74, 74, 66, 49, 54, 55, 51, 49 → 61.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 25 · 2016→2017: 11 · 2017→2018: 11 · 2018→2019: 0 · 2019→2021: 8 · 2021→2022: 17 · 2022→2023: 5 · 2023→2024: 1 · 2024→2025: 4 · 2025→2026: 2 → average 8.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.4 × 2.66 = 22.3. Upper limit 84.1, lower limit 39.5.

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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