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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	53,820	2473.1	− 2432	41.1	× 323 / 2295	5.8
4	53,823	2519.4	− 2473	46.4	× 341 / 2295	6.9
5	53,824	2546.0	− 2502	44	× 365 / 2295	7
6	53,827	2563.8	− 2531	32.8	× 394 / 2295	5.6
7	53,828	2611.6	− 2552	59.6	× 417 / 2295	10.8
8	53,831	2629.2	− 2567	62.2	× 455 / 2295	12.3
Sum, rounded to a whole point						48

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	49,997	2487.2	− 2432	55.2	× 352 / 2271	8.6
4	49,999	2521.5	− 2473	48.5	× 326 / 2271	7
5	50,002	2552.2	− 2502	50.2	× 351 / 2271	7.8
6	50,004	2580.5	− 2531	49.5	× 391 / 2271	8.5
7	50,005	2614.0	− 2552	62	× 439 / 2271	12
8	50,007	2630.3	− 2567	63.3	× 412 / 2271	11.5
Sum, rounded to a whole point						55

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,408	2485.2	− 2432	53.2	× 333 / 2319	7.6
4	51,410	2528.2	− 2473	55.2	× 361 / 2319	8.6
5	51,412	2545.8	− 2502	43.8	× 358 / 2319	6.8
6	51,414	2584.0	− 2531	53	× 368 / 2319	8.4
7	51,415	2620.8	− 2552	68.8	× 449 / 2319	13.3
8	51,417	2628.2	− 2567	61.2	× 450 / 2319	11.9
Sum, rounded to a whole point						57

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,435	2481.0	− 2432	49	× 352 / 2348	7.3
4	51,437	2527.0	− 2473	54	× 345 / 2348	7.9
5	51,439	2565.7	− 2502	63.7	× 381 / 2348	10.3
6	51,442	2575.5	− 2531	44.5	× 381 / 2348	7.2
7	51,443	2620.0	− 2552	68	× 417 / 2348	12.1
8	51,446	2631.9	− 2567	64.9	× 472 / 2348	13
Sum, rounded to a whole point						58

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,628	2477.8	− 2432	45.8	× 339 / 2291	6.8
4	51,629	2530.7	− 2473	57.7	× 344 / 2291	8.7
5	51,630	2553.9	− 2502	51.9	× 375 / 2291	8.5
6	51,631	2590.5	− 2531	59.5	× 402 / 2291	10.4
7	51,632	2616.0	− 2552	64	× 406 / 2291	11.3
8	51,633	2645.9	− 2567	78.9	× 425 / 2291	14.6
Sum, rounded to a whole point						60

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	50,397	2470.9	− 2432	38.9	× 303 / 2161	5.5
4	50,398	2511.1	− 2473	38.1	× 332 / 2161	5.9
5	50,399	2549.8	− 2502	47.8	× 336 / 2161	7.4
6	50,400	2584.7	− 2531	53.7	× 360 / 2161	8.9
7	50,401	2621.8	− 2552	69.8	× 390 / 2161	12.6
8	50,402	2635.3	− 2567	68.3	× 440 / 2161	13.9
Sum, rounded to a whole point						54

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,568	2488.6	− 2432	56.6	× 280 / 2032	7.8
4	51,569	2521.8	− 2473	48.8	× 295 / 2032	7.1
5	51,570	2546.8	− 2502	44.8	× 340 / 2032	7.5
6	51,571	2589.4	− 2531	58.4	× 338 / 2032	9.7
7	51,572	2625.9	− 2552	73.9	× 381 / 2032	13.9
8	51,573	2629.5	− 2567	62.5	× 398 / 2032	12.2
Sum, rounded to a whole point						58

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,533	2464.8	− 2432	32.8	× 332 / 2067	5.3
4	51,534	2530.7	− 2473	57.7	× 287 / 2067	8
5	51,535	2551.2	− 2502	49.2	× 313 / 2067	7.5
6	51,536	2582.7	− 2531	51.7	× 354 / 2067	8.9
7	51,537	2621.7	− 2552	69.7	× 390 / 2067	13.2
8	51,538	2644.5	− 2567	77.5	× 391 / 2067	14.7
Sum, rounded to a whole point						57

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,347	2456.5	− 2432	24.5	× 342 / 2139	3.9
4	51,348	2510.9	− 2473	37.9	× 346 / 2139	6.1
5	51,349	2554.3	− 2502	52.3	× 314 / 2139	7.7
6	51,350	2585.1	− 2531	54.1	× 339 / 2139	8.6
7	51,351	2615.3	− 2552	63.3	× 399 / 2139	11.8
8	51,352	2644.3	− 2567	77.3	× 399 / 2139	14.4
Sum, rounded to a whole point						53

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,135	2470.6	− 2432	38.6	× 355 / 2239	6.1
4	51,136	2506.4	− 2473	33.4	× 368 / 2239	5.5
5	51,137	2555.6	− 2502	53.6	× 376 / 2239	9
6	51,138	2602.0	− 2531	71	× 336 / 2239	10.7
7	51,139	2626.1	− 2552	74.1	× 385 / 2239	12.7
8	51,140	2635.9	− 2567	68.9	× 419 / 2239	12.9
Sum, rounded to a whole point						57

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,012	2480.0	− 2432	48	× 346 / 2322	7.2
4	51,013	2505.8	− 2473	32.8	× 394 / 2322	5.6
5	51,014	2538.5	− 2502	36.5	× 387 / 2322	6.1
6	51,015	2595.7	− 2531	64.7	× 414 / 2322	11.5
7	51,016	2621.7	− 2552	69.7	× 384 / 2322	11.5
8	51,017	2631.1	− 2567	64.1	× 397 / 2322	11
Sum, rounded to a whole point						53

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 48, 55, 57, 58, 60, 54, 58, 57, 53, 57, 53 → 55.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 7 · 2016→2017: 2 · 2017→2018: 1 · 2018→2019: 2 · 2019→2021: 6 · 2021→2022: 4 · 2022→2023: 1 · 2023→2024: 4 · 2024→2025: 4 · 2025→2026: 4 → average 3.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 3.5 × 2.66 = 9.3. Upper limit 64.8, lower limit 46.2.

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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