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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	87,807	2443.9	− 2432	11.9	× 563 / 2949	2.3
4	87,810	2497.4	− 2473	24.4	× 504 / 2949	4.2
5	87,811	2537.7	− 2502	35.7	× 523 / 2949	6.3
6	87,814	2553.7	− 2531	22.7	× 471 / 2949	3.6
7	87,815	2578.7	− 2552	26.7	× 461 / 2949	4.2
8	87,818	2602.7	− 2567	35.7	× 427 / 2949	5.2
Sum, rounded to a whole point						26

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,492	2479.1	− 2432	47.1	× 506 / 2964	8
4	81,494	2505.5	− 2473	32.5	× 565 / 2964	6.2
5	81,495	2559.1	− 2502	57.1	× 506 / 2964	9.7
6	81,498	2571.0	− 2531	40	× 504 / 2964	6.8
7	81,500	2602.0	− 2552	50	× 447 / 2964	7.5
8	81,502	2607.2	− 2567	40.2	× 436 / 2964	5.9
Sum, rounded to a whole point						44

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,756	2460.4	− 2432	28.4	× 540 / 2972	5.2
4	83,757	2519.9	− 2473	46.9	× 487 / 2972	7.7
5	83,760	2538.8	− 2502	36.8	× 544 / 2972	6.7
6	83,761	2568.5	− 2531	37.5	× 467 / 2972	5.9
7	83,763	2606.5	− 2552	54.5	× 492 / 2972	9
8	83,766	2619.9	− 2567	52.9	× 442 / 2972	7.9
Sum, rounded to a whole point						42

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,976	2475.0	− 2432	43	× 509 / 2998	7.3
4	83,978	2514.5	− 2473	41.5	× 536 / 2998	7.4
5	83,980	2556.9	− 2502	54.9	× 491 / 2998	9
6	83,982	2563.0	− 2531	32	× 526 / 2998	5.6
7	83,984	2602.2	− 2552	50.2	× 444 / 2998	7.4
8	83,986	2614.4	− 2567	47.4	× 492 / 2998	7.8
Sum, rounded to a whole point						45

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,585	2470.1	− 2432	38.1	× 515 / 2967	6.6
4	84,586	2521.5	− 2473	48.5	× 501 / 2967	8.2
5	84,587	2549.9	− 2502	47.9	× 527 / 2967	8.5
6	84,588	2578.0	− 2531	47	× 465 / 2967	7.4
7	84,589	2595.0	− 2552	43	× 518 / 2967	7.5
8	84,590	2623.2	− 2567	56.2	× 441 / 2967	8.4
Sum, rounded to a whole point						47

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,756	2475.1	− 2432	43.1	× 419 / 2627	6.9
4	84,757	2514.6	− 2473	41.6	× 424 / 2627	6.7
5	84,758	2540.5	− 2502	38.5	× 446 / 2627	6.5
6	84,759	2565.1	− 2531	34.1	× 422 / 2627	5.5
7	84,760	2598.6	− 2552	46.6	× 445 / 2627	7.9
8	84,761	2607.1	− 2567	40.1	× 471 / 2627	7.2
Sum, rounded to a whole point						41

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,695	2461.9	− 2432	29.9	× 389 / 2482	4.7
4	84,696	2509.6	− 2473	36.6	× 417 / 2482	6.1
5	84,697	2549.9	− 2502	47.9	× 420 / 2482	8.1
6	84,698	2556.0	− 2531	25	× 413 / 2482	4.2
7	84,699	2592.6	− 2552	40.6	× 404 / 2482	6.6
8	84,700	2604.6	− 2567	37.6	× 439 / 2482	6.7
Sum, rounded to a whole point						36

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,688	2458.3	− 2432	26.3	× 399 / 2435	4.3
4	84,689	2497.9	− 2473	24.9	× 398 / 2435	4.1
5	84,690	2540.8	− 2502	38.8	× 425 / 2435	6.8
6	84,691	2561.6	− 2531	30.6	× 398 / 2435	5
7	84,692	2598.1	− 2552	46.1	× 403 / 2435	7.6
8	84,693	2594.5	− 2567	27.5	× 412 / 2435	4.7
Sum, rounded to a whole point						32

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,382	2461.0	− 2432	29	× 398 / 2400	4.8
4	84,383	2500.4	− 2473	27.4	× 390 / 2400	4.5
5	84,384	2528.3	− 2502	26.3	× 413 / 2400	4.5
6	84,385	2559.5	− 2531	28.5	× 395 / 2400	4.7
7	84,386	2598.8	− 2552	46.8	× 400 / 2400	7.8
8	84,387	2607.1	− 2567	40.1	× 404 / 2400	6.8
Sum, rounded to a whole point						33

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,157	2457.0	− 2432	25	× 386 / 2366	4.1
4	84,158	2491.0	− 2473	18	× 405 / 2366	3.1
5	84,159	2542.3	− 2502	40.3	× 368 / 2366	6.3
6	84,160	2544.0	− 2531	13	× 404 / 2366	2.2
7	84,161	2589.9	− 2552	37.9	× 411 / 2366	6.6
8	84,162	2618.6	− 2567	51.6	× 392 / 2366	8.5
Sum, rounded to a whole point						31

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 26, 44, 42, 45, 47, 41, 36, 32, 33, 31 → 37.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 18 · 2016→2017: 2 · 2017→2018: 3 · 2018→2019: 2 · 2019→2022: 6 · 2022→2023: 5 · 2023→2024: 4 · 2024→2025: 1 · 2025→2026: 2 → average 4.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 4.8 × 2.66 = 12.8. Upper limit 50.5, lower limit 24.9.

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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