Windmill Springs Elementary: english

The shaded band is this school'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	87,312	2386.8	− 2432	−45.2	× 58 / 389	−6.7
4	87,314	2447.8	− 2473	−25.2	× 62 / 389	−4
5	87,316	2469.8	− 2502	−32.2	× 67 / 389	−5.5
6	87,318	2505.4	− 2531	−25.6	× 63 / 389	−4.1
7	87,320	2519.8	− 2552	−32.2	× 52 / 389	−4.3
8	87,322	2553.5	− 2567	−13.5	× 87 / 389	−3
Sum, rounded to a whole point						−28

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,047	2410.4	− 2432	−21.6	× 48 / 333	−3.1
4	81,050	2480.0	− 2473	7	× 59 / 333	1.2
5	81,051	2495.6	− 2502	−6.4	× 63 / 333	−1.2
6	81,053	2535.1	− 2531	4.1	× 64 / 333	0.8
7	81,056	2550.2	− 2552	−1.8	× 56 / 333	−0.3
8	81,057	2581.3	− 2567	14.3	× 43 / 333	1.8
Sum, rounded to a whole point						−1

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,281	2414.5	− 2432	−17.5	× 46 / 310	−2.6
4	83,284	2455.2	− 2473	−17.8	× 54 / 310	−3.1
5	83,286	2499.0	− 2502	−3	× 60 / 310	−0.6
6	83,287	2544.4	− 2531	13.4	× 65 / 310	2.8
7	83,289	2560.1	− 2552	8.1	× 33 / 310	0.9
8	83,291	2589.8	− 2567	22.8	× 52 / 310	3.8
Sum, rounded to a whole point						1

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,509	2445.7	− 2432	13.7	× 30 / 270	1.5
4	83,512	2447.0	− 2473	−26	× 51 / 270	−4.9
5	83,513	2482.7	− 2502	−19.3	× 59 / 270	−4.2
6	83,516	2531.6	− 2531	0.6	× 53 / 270	0.1
7	83,517	2552.4	− 2552	0.4	× 44 / 270	0.1
8	83,520	2565.8	− 2567	−1.2	× 33 / 270	−0.1
Sum, rounded to a whole point						−8

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,119	2392.9	− 2432	−39.1	× 49 / 305	−6.3
4	84,120	2436.7	− 2473	−36.3	× 32 / 305	−3.8
5	84,121	2472.3	− 2502	−29.7	× 58 / 305	−5.6
6	84,122	2534.9	− 2531	3.9	× 66 / 305	0.8
7	84,123	2535.8	− 2552	−16.2	× 52 / 305	−2.8
8	84,124	2564.2	− 2567	−2.8	× 48 / 305	−0.4
Sum, rounded to a whole point						−18

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,280	2412.8	− 2432	−19.2	× 38 / 238	−3.1
4	84,281	2415.9	− 2473	−57.1	× 46 / 238	−11
5	84,282	2467.9	− 2502	−34.1	× 26 / 238	−3.7
6	84,283	2503.6	− 2531	−27.4	× 40 / 238	−4.6
7	84,284	2528.7	− 2552	−23.3	× 33 / 238	−3.2
8	84,285	2543.9	− 2567	−23.1	× 55 / 238	−5.3
Sum, rounded to a whole point						−31

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,221	2398.5	− 2432	−33.5	× 66 / 263	−8.4
4	84,222	2403.8	− 2473	−69.2	× 43 / 263	−11.3
5	84,223	2456.6	− 2502	−45.4	× 51 / 263	−8.8
6	84,224	2497.4	− 2531	−33.6	× 30 / 263	−3.8
7	84,225	2513.2	− 2552	−38.8	× 42 / 263	−6.2
8	84,226	2570.0	− 2567	3	× 31 / 263	0.4
Sum, rounded to a whole point						−38

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,224	2384.5	− 2432	−47.5	× 63 / 320	−9.4
4	84,225	2442.1	− 2473	−30.9	× 68 / 320	−6.6
5	84,226	2449.1	− 2502	−52.9	× 42 / 320	−6.9
6	84,227	2503.9	− 2531	−27.1	× 58 / 320	−4.9
7	84,228	2479.3	− 2552	−72.7	× 49 / 320	−11.1
8	84,229	2539.1	− 2567	−27.9	× 40 / 320	−3.5
Sum, rounded to a whole point						−42

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,906	2377.0	− 2432	−55	× 60 / 348	−9.5
4	83,907	2454.7	− 2473	−18.3	× 68 / 348	−3.6
5	83,908	2482.7	− 2502	−19.3	× 72 / 348	−4
6	83,909	2490.8	− 2531	−40.2	× 46 / 348	−5.3
7	83,910	2510.5	− 2552	−41.5	× 60 / 348	−7.2
8	83,911	2518.0	− 2567	−49	× 42 / 348	−5.9
Sum, rounded to a whole point						−35

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −28, −1, 1, −8, −18, −31, −38, −42, −35 → −22.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 27 · 2016→2017: 2 · 2017→2018: 9 · 2018→2019: 10 · 2019→2022: 13 · 2022→2023: 7 · 2023→2024: 4 · 2024→2025: 7 → average 9.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.9 × 2.66 = 26.3. Upper limit 4.1, lower limit −48.5.

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. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.