Winship-Robbins: 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	98,795	2424.0	− 2432	−8	× 23 / 131	−1.4
4	98,796	2452.2	− 2473	−20.8	× 20 / 131	−3.2
5	98,799	2475.0	− 2502	−27	× 21 / 131	−4.3
6	98,800	2505.6	− 2531	−25.4	× 21 / 131	−4.1
7	98,803	2509.5	− 2552	−42.5	× 22 / 131	−7.1
8	98,804	2511.3	− 2567	−55.7	× 24 / 131	−10.2
Sum, rounded to a whole point						−30

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,567	2394.9	− 2432	−37.1	× 21 / 122	−6.4
4	91,569	2466.3	− 2473	−6.7	× 21 / 122	−1.2
5	91,570	2468.2	− 2502	−33.8	× 17 / 122	−4.7
6	91,573	2543.3	− 2531	12.3	× 20 / 122	2
7	91,574	2589.5	− 2552	37.5	× 22 / 122	6.8
8	91,577	2573.6	− 2567	6.6	× 21 / 122	1.1
Sum, rounded to a whole point						−2

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	94,324	2391.4	− 2432	−40.6	× 14 / 101	−5.6
4	94,326	2438.7	− 2473	−34.3	× 16 / 101	−5.4
5	94,329	2498.1	− 2502	−3.9	× 17 / 101	−0.7
6	94,331	2528.6	− 2531	−2.4	× 14 / 101	−0.3
7	94,332	2570.3	− 2552	18.3	× 20 / 101	3.6
8	94,334	2624.1	− 2567	57.1	× 20 / 101	11.3
Sum, rounded to a whole point						3

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	94,534	2397.7	− 2432	−34.3	× 12 / 89	−4.6
4	94,536	2471.8	− 2473	−1.2	× 13 / 89	−0.2
5	94,539	2484.3	− 2502	−17.7	× 17 / 89	−3.4
6	94,541	2549.0	− 2531	18	× 16 / 89	3.2
7	94,542	2585.0	− 2552	33	× 15 / 89	5.6
8	94,545	2624.4	− 2567	57.4	× 16 / 89	10.3
Sum, rounded to a whole point						11

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	95,171	2442.3	− 2432	10.3	× 12 / 76	1.6
5	95,173	2518.1	− 2502	16.1	× 14 / 76	3
6	95,174	2530.4	− 2531	−0.6	× 14 / 76	−0.1
7	95,175	2585.0	− 2552	33	× 22 / 76	9.6
8	95,176	2611.0	− 2567	44	× 14 / 76	8.1
Sum, rounded to a whole point						22

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,120	2411.1	− 2432	−20.9	× 20 / 89	−4.7
4	93,121	2416.2	− 2473	−56.8	× 11 / 89	−7
5	93,122	2440.6	− 2502	−61.4	× 14 / 89	−9.7
6	93,123	2477.0	− 2531	−54	× 11 / 89	−6.7
7	93,124	2569.1	− 2552	17.1	× 17 / 89	3.3
8	93,125	2533.4	− 2567	−33.6	× 16 / 89	−6
Sum, rounded to a whole point						−31

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	95,386	2426.4	− 2473	−46.6	× 19 / 58	−15.3
6	95,388	2478.1	− 2531	−52.9	× 14 / 58	−12.8
7	95,389	2474.2	− 2552	−77.8	× 11 / 58	−14.8
8	95,390	2568.3	− 2567	1.3	× 14 / 58	0.3
Sum, rounded to a whole point						−42

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	95,283	2423.4	− 2432	−8.6	× 14 / 45	−2.7
5	95,285	2464.1	− 2502	−37.9	× 20 / 45	−16.8
7	95,287	2517.0	− 2552	−35	× 11 / 45	−8.6
Sum, rounded to a whole point						−28

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	95,149	2443.1	− 2473	−29.9	× 14 / 46	−9.1
6	95,151	2501.6	− 2531	−29.4	× 21 / 46	−13.4
8	95,153	2576.3	− 2567	9.3	× 11 / 46	2.2
Sum, rounded to a whole point						−20

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	94,880	2442.5	− 2432	10.5	× 12 / 51	2.5
5	94,882	2513.3	− 2502	11.3	× 14 / 51	3.1
7	94,884	2549.7	− 2552	−2.3	× 25 / 51	−1.1
Sum, rounded to a whole point						4

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −30, −2, 3, 11, 22, −31, −42, −28, −20, 4 → −11.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 28 · 2016→2017: 5 · 2017→2018: 8 · 2018→2019: 11 · 2019→2021: 53 · 2021→2022: 11 · 2022→2023: 14 · 2023→2024: 8 · 2024→2025: 24 → average 18
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 18 × 2.66 = 47.9. Upper limit 36.6, lower limit −59.2.

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.