Sebastopol Union Elementary: english

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	95,445	2393.2	− 2432	−38.8	× 60 / 306	−7.6
4	95,447	2449.6	− 2473	−23.4	× 41 / 306	−3.1
5	95,449	2479.1	− 2502	−22.9	× 56 / 306	−4.2
6	95,451	2469.6	− 2531	−61.4	× 64 / 306	−12.8
7	95,453	2498.8	− 2552	−53.2	× 48 / 306	−8.3
8	95,455	2524.0	− 2567	−43	× 37 / 306	−5.2
Sum, rounded to a whole point						−41

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	88,596	2440.4	− 2432	8.4	× 45 / 369	1
4	88,598	2435.3	− 2473	−37.7	× 57 / 369	−5.8
5	88,599	2472.8	− 2502	−29.2	× 46 / 369	−3.6
6	88,602	2508.6	− 2531	−22.4	× 58 / 369	−3.5
7	88,604	2508.1	− 2552	−43.9	× 78 / 369	−9.3
8	88,605	2563.4	− 2567	−3.6	× 85 / 369	−0.8
Sum, rounded to a whole point						−22

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,134	2445.2	− 2432	13.2	× 54 / 344	2.1
4	91,136	2470.6	− 2473	−2.4	× 45 / 344	−0.3
5	91,139	2482.1	− 2502	−19.9	× 55 / 344	−3.2
6	91,141	2491.3	− 2531	−39.7	× 53 / 344	−6.1
7	91,143	2517.9	− 2552	−34.1	× 62 / 344	−6.1
8	91,144	2549.0	− 2567	−18	× 75 / 344	−3.9
Sum, rounded to a whole point						−18

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,326	2422.3	− 2432	−9.7	× 42 / 308	−1.3
4	91,327	2489.1	− 2473	16.1	× 46 / 308	2.4
5	91,330	2489.8	− 2502	−12.2	× 50 / 308	−2
6	91,331	2492.7	− 2531	−38.3	× 57 / 308	−7.1
7	91,334	2527.0	− 2552	−25	× 50 / 308	−4.1
8	91,335	2552.2	− 2567	−14.8	× 63 / 308	−3
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	91,965	2425.2	− 2432	−6.8	× 57 / 291	−1.3
4	91,966	2517.9	− 2473	44.9	× 42 / 291	6.5
5	91,967	2533.6	− 2502	31.6	× 45 / 291	4.9
6	91,968	2542.1	− 2531	11.1	× 44 / 291	1.7
7	91,969	2569.0	− 2552	17	× 51 / 291	3
8	91,970	2579.9	− 2567	12.9	× 52 / 291	2.3
Sum, rounded to a whole point						17

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,211	2390.9	− 2432	−41.1	× 54 / 296	−7.5
4	92,212	2485.1	− 2473	12.1	× 39 / 296	1.6
5	92,213	2484.8	− 2502	−17.2	× 45 / 296	−2.6
6	92,214	2550.5	− 2531	19.5	× 51 / 296	3.4
7	92,215	2573.8	− 2552	21.8	× 43 / 296	3.2
8	92,216	2582.9	− 2567	15.9	× 64 / 296	3.4
Sum, rounded to a whole point						1

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,127	2418.4	− 2432	−13.6	× 40 / 287	−1.9
4	92,128	2470.0	− 2473	−3	× 47 / 287	−0.5
5	92,129	2499.7	− 2502	−2.3	× 49 / 287	−0.4
6	92,130	2535.7	− 2531	4.7	× 52 / 287	0.9
7	92,131	2555.3	− 2552	3.3	× 52 / 287	0.6
8	92,132	2605.3	− 2567	38.3	× 47 / 287	6.3
Sum, rounded to a whole point						5

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,046	2426.0	− 2432	−6	× 35 / 285	−0.7
4	92,047	2478.0	− 2473	5	× 41 / 285	0.7
5	92,048	2501.2	− 2502	−0.8	× 52 / 285	−0.1
6	92,049	2549.8	− 2531	18.8	× 46 / 285	3
7	92,050	2561.5	− 2552	9.5	× 55 / 285	1.8
8	92,051	2582.6	− 2567	15.6	× 56 / 285	3.1
Sum, rounded to a whole point						8

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,756	2441.8	− 2432	9.8	× 66 / 310	2.1
4	91,757	2511.7	− 2473	38.7	× 33 / 310	4.1
5	91,758	2477.7	− 2502	−24.3	× 53 / 310	−4.2
6	91,759	2547.3	− 2531	16.3	× 55 / 310	2.9
7	91,760	2554.7	− 2552	2.7	× 50 / 310	0.4
8	91,761	2579.5	− 2567	12.5	× 53 / 310	2.1
Sum, rounded to a whole point						8

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −41, −22, −18, −15, 17, 1, 5, 8, 8 → −6.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 19 · 2016→2017: 4 · 2017→2018: 3 · 2018→2019: 32 · 2019→2022: 16 · 2022→2023: 4 · 2023→2024: 3 · 2024→2025: 0 → average 10.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.1 × 2.66 = 26.9. Upper limit 20.6, lower limit −33.2.

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.