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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	86,577	2492.3	− 2432	60.3	× 1991 / 12632	9.5
4	86,580	2543.3	− 2473	70.3	× 2145 / 12632	11.9
5	86,581	2584.0	− 2502	82	× 2209 / 12632	14.3
6	86,584	2607.0	− 2531	76	× 2178 / 12632	13.1
7	86,585	2629.1	− 2552	77.1	× 2070 / 12632	12.6
8	86,588	2650.2	− 2567	83.2	× 2039 / 12632	13.4
Sum, rounded to a whole point						75

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,340	2494.2	− 2432	62.2	× 2007 / 12512	10
4	80,342	2547.7	− 2473	74.7	× 1989 / 12512	11.9
5	80,345	2590.7	− 2502	88.7	× 2118 / 12512	15
6	80,347	2613.3	− 2531	82.3	× 2153 / 12512	14.2
7	80,348	2639.1	− 2552	87.1	× 2170 / 12512	15.1
8	80,350	2655.9	− 2567	88.9	× 2075 / 12512	14.7
Sum, rounded to a whole point						81

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	82,553	2495.1	− 2432	63.1	× 1930 / 12290	9.9
4	82,556	2539.6	− 2473	66.6	× 1993 / 12290	10.8
5	82,558	2584.8	− 2502	82.8	× 1952 / 12290	13.2
6	82,559	2612.0	− 2531	81	× 2095 / 12290	13.8
7	82,562	2635.5	− 2552	83.5	× 2162 / 12290	14.7
8	82,563	2661.1	− 2567	94.1	× 2158 / 12290	16.5
Sum, rounded to a whole point						79

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	82,760	2504.0	− 2432	72	× 1752 / 11739	10.7
4	82,762	2551.3	− 2473	78.3	× 1933 / 11739	12.9
5	82,764	2584.3	− 2502	82.3	× 1959 / 11739	13.7
6	82,766	2611.2	− 2531	80.2	× 1904 / 11739	13
7	82,768	2638.0	− 2552	86	× 2055 / 11739	15.1
8	82,770	2655.5	− 2567	88.5	× 2136 / 11739	16.1
Sum, rounded to a whole point						82

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,371	2503.8	− 2432	71.8	× 1815 / 11275	11.6
4	83,372	2549.6	− 2473	76.6	× 1723 / 11275	11.7
5	83,373	2591.1	− 2502	89.1	× 1923 / 11275	15.2
6	83,374	2607.3	− 2531	76.3	× 1910 / 11275	12.9
7	83,375	2641.2	− 2552	89.2	× 1904 / 11275	15.1
8	83,376	2657.7	− 2567	90.7	× 2000 / 11275	16.1
Sum, rounded to a whole point						83

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,691	2495.1	− 2432	63.1	× 1585 / 9953	10
4	81,692	2538.0	− 2473	65	× 1646 / 9953	10.7
5	81,693	2583.8	− 2502	81.8	× 1679 / 9953	13.8
6	81,694	2603.4	− 2531	72.4	× 1573 / 9953	11.4
7	81,695	2642.6	− 2552	90.6	× 1730 / 9953	15.7
8	81,696	2657.2	− 2567	90.2	× 1740 / 9953	15.8
Sum, rounded to a whole point						78

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,570	2502.7	− 2432	70.7	× 1473 / 9271	11.2
4	83,571	2553.9	− 2473	80.9	× 1476 / 9271	12.9
5	83,572	2593.0	− 2502	91	× 1541 / 9271	15.1
6	83,573	2608.9	− 2531	77.9	× 1604 / 9271	13.5
7	83,574	2647.8	− 2552	95.8	× 1493 / 9271	15.4
8	83,575	2666.0	− 2567	99	× 1684 / 9271	18
Sum, rounded to a whole point						86

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,527	2495.7	− 2432	63.7	× 1370 / 8961	9.7
4	83,528	2550.3	− 2473	77.3	× 1455 / 8961	12.6
5	83,529	2589.6	− 2502	87.6	× 1488 / 8961	14.5
6	83,530	2617.4	− 2531	86.4	× 1539 / 8961	14.8
7	83,531	2647.1	− 2552	95.1	× 1615 / 8961	17.1
8	83,532	2665.6	− 2567	98.6	× 1494 / 8961	16.4
Sum, rounded to a whole point						85

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,536	2496.8	− 2432	64.8	× 1357 / 8834	10
4	83,537	2541.2	− 2473	68.2	× 1402 / 8834	10.8
5	83,538	2592.3	− 2502	90.3	× 1445 / 8834	14.8
6	83,539	2613.9	− 2531	82.9	× 1488 / 8834	14
7	83,540	2654.0	− 2552	102	× 1535 / 8834	17.7
8	83,541	2665.5	− 2567	98.5	× 1607 / 8834	17.9
Sum, rounded to a whole point						85

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,212	2492.7	− 2432	60.7	× 1365 / 8813	9.4
4	83,213	2541.7	− 2473	68.7	× 1420 / 8813	11.1
5	83,214	2584.6	− 2502	82.6	× 1432 / 8813	13.4
6	83,215	2613.5	− 2531	82.5	× 1516 / 8813	14.2
7	83,216	2649.6	− 2552	97.6	× 1521 / 8813	16.8
8	83,217	2669.9	− 2567	102.9	× 1559 / 8813	18.2
Sum, rounded to a whole point						83

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,027	2487.2	− 2432	55.2	× 1321 / 8774	8.3
4	83,028	2533.7	− 2473	60.7	× 1403 / 8774	9.7
5	83,029	2584.1	− 2502	82.1	× 1454 / 8774	13.6
6	83,030	2596.9	− 2531	65.9	× 1505 / 8774	11.3
7	83,031	2636.9	− 2552	84.9	× 1559 / 8774	15.1
8	83,032	2656.4	− 2567	89.4	× 1532 / 8774	15.6
Sum, rounded to a whole point						74

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 75, 81, 79, 82, 83, 78, 86, 85, 85, 83, 74 → 81
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2017: 2 · 2017→2018: 3 · 2018→2019: 1 · 2019→2021: 5 · 2021→2022: 8 · 2022→2023: 1 · 2023→2024: 0 · 2024→2025: 2 · 2025→2026: 9 → average 3.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 3.7 × 2.66 = 9.8. Upper limit 90.8, lower limit 71.2.

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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