Anderson Valley Unified: 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	43,106	2423.0	− 2432	−9	× 42 / 260	−1.5
4	43,107	2434.5	− 2473	−38.5	× 42 / 260	−6.2
5	43,109	2502.7	− 2502	0.7	× 31 / 260	0.1
6	43,112	2525.8	− 2531	−5.2	× 30 / 260	−0.6
7	43,113	2490.2	− 2552	−61.8	× 27 / 260	−6.4
8	43,115	2559.7	− 2567	−7.3	× 49 / 260	−1.4
11	43,117	2645.3	− 2583	62.3	× 39 / 260	9.3
Sum, rounded to a whole point						−7

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,798	2379.6	− 2432	−52.4	× 37 / 262	−7.4
4	39,799	2451.8	− 2473	−21.2	× 39 / 262	−3.2
5	39,802	2467.4	− 2502	−34.6	× 50 / 262	−6.6
6	39,803	2507.7	− 2531	−23.3	× 31 / 262	−2.8
7	39,805	2532.8	− 2552	−19.2	× 32 / 262	−2.3
8	39,807	2535.3	− 2567	−31.7	× 27 / 262	−3.3
11	39,809	2613.2	− 2583	30.2	× 46 / 262	5.3
Sum, rounded to a whole point						−20

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,817	2407.7	− 2432	−24.3	× 35 / 250	−3.4
4	40,819	2406.1	− 2473	−66.9	× 37 / 250	−9.9
5	40,820	2532.5	− 2502	30.5	× 37 / 250	4.5
6	40,822	2492.1	− 2531	−38.9	× 47 / 250	−7.3
7	40,824	2527.3	− 2552	−24.7	× 28 / 250	−2.8
8	40,827	2566.7	− 2567	−0.3	× 31 / 250	0
11	40,829	2623.5	− 2583	40.5	× 35 / 250	5.7
Sum, rounded to a whole point						−13

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,837	2450.5	− 2432	18.5	× 28 / 264	2
4	40,840	2451.4	− 2473	−21.6	× 38 / 264	−3.1
5	40,841	2493.5	− 2502	−8.5	× 36 / 264	−1.2
6	40,844	2565.0	− 2531	34	× 41 / 264	5.3
7	40,845	2539.9	− 2552	−12.1	× 48 / 264	−2.2
8	40,848	2547.7	− 2567	−19.3	× 31 / 264	−2.3
11	40,849	2588.5	− 2583	5.5	× 42 / 264	0.9
Sum, rounded to a whole point						−1

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,983	2378.8	− 2432	−53.2	× 39 / 252	−8.2
4	40,984	2478.1	− 2473	5.1	× 29 / 252	0.6
5	40,985	2499.9	− 2502	−2.1	× 39 / 252	−0.3
6	40,986	2497.9	− 2531	−33.1	× 38 / 252	−5
7	40,987	2584.4	− 2552	32.4	× 41 / 252	5.3
8	40,988	2548.4	− 2567	−18.6	× 47 / 252	−3.5
11	40,989	2565.8	− 2583	−17.2	× 19 / 252	−1.3
Sum, rounded to a whole point						−12

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,748	2342.5	− 2432	−89.5	× 25 / 242	−9.2
4	40,749	2359.4	− 2473	−113.6	× 32 / 242	−15
5	40,750	2464.1	− 2502	−37.9	× 35 / 242	−5.5
6	40,751	2440.5	− 2531	−90.5	× 37 / 242	−13.8
7	40,752	2538.8	− 2552	−13.2	× 29 / 242	−1.6
8	40,753	2533.4	− 2567	−33.6	× 43 / 242	−6
11	40,754	2580.3	− 2583	−2.7	× 41 / 242	−0.5
Sum, rounded to a whole point						−52

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,783	2299.5	− 2432	−132.5	× 20 / 198	−13.4
4	40,784	2416.3	− 2473	−56.7	× 21 / 198	−6
5	40,785	2415.5	− 2502	−86.5	× 27 / 198	−11.8
6	40,786	2510.0	− 2531	−21	× 30 / 198	−3.2
7	40,787	2478.8	− 2552	−73.2	× 36 / 198	−13.3
8	40,788	2583.0	− 2567	16	× 27 / 198	2.2
11	40,789	2590.0	− 2583	7	× 37 / 198	1.3
Sum, rounded to a whole point						−44

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,602	2379.0	− 2432	−53	× 28 / 191	−7.8
4	40,603	2351.1	− 2473	−121.9	× 17 / 191	−10.8
5	40,604	2407.8	− 2502	−94.2	× 22 / 191	−10.9
6	40,605	2419.3	− 2531	−111.7	× 29 / 191	−17
7	40,606	2533.3	− 2552	−18.7	× 29 / 191	−2.8
8	40,607	2492.7	− 2567	−74.3	× 37 / 191	−14.4
11	40,608	2575.1	− 2583	−7.9	× 29 / 191	−1.2
Sum, rounded to a whole point						−65

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,391	2385.4	− 2432	−46.6	× 19 / 181	−4.9
4	40,392	2409.3	− 2473	−63.7	× 29 / 181	−10.2
5	40,393	2401.9	− 2502	−100.1	× 19 / 181	−10.5
6	40,394	2437.5	− 2531	−93.5	× 24 / 181	−12.4
7	40,395	2458.1	− 2552	−93.9	× 27 / 181	−14
8	40,396	2539.7	− 2567	−27.3	× 28 / 181	−4.2
11	40,397	2589.7	− 2583	6.7	× 35 / 181	1.3
Sum, rounded to a whole point						−55

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −7, −20, −13, −1, −12, −52, −44, −65, −55 → −29.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 13 · 2016→2017: 7 · 2017→2018: 12 · 2018→2019: 11 · 2019→2022: 40 · 2022→2023: 8 · 2023→2024: 21 · 2024→2025: 10 → average 15.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 15.3 × 2.66 = 40.7. Upper limit 10.8, lower limit −70.6.

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.