Windsor Unified: math

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	96,024	2408.4	− 2436	−27.6	× 329 / 2670	−3.4
4	96,027	2432.5	− 2485	−52.5	× 351 / 2670	−6.9
5	96,028	2453.5	− 2528	−74.5	× 397 / 2670	−11.1
6	96,031	2491.5	− 2552	−60.5	× 365 / 2670	−8.3
7	96,032	2518.6	− 2567	−48.4	× 439 / 2670	−8
8	96,035	2548.5	− 2586	−37.5	× 392 / 2670	−5.5
11	96,036	2564.8	− 2628	−63.2	× 397 / 2670	−9.4
Sum, rounded to a whole point						−53

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,081	2414.2	− 2436	−21.8	× 372 / 2683	−3
4	89,084	2453.5	− 2485	−31.5	× 335 / 2683	−3.9
5	89,085	2459.9	− 2528	−68.1	× 345 / 2683	−8.8
6	89,088	2475.3	− 2552	−76.7	× 396 / 2683	−11.3
7	89,089	2517.2	− 2567	−49.8	× 374 / 2683	−6.9
8	89,091	2533.2	− 2586	−52.8	× 430 / 2683	−8.5
11	89,093	2563.6	− 2628	−64.4	× 431 / 2683	−10.3
Sum, rounded to a whole point						−53

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,650	2419.1	− 2436	−16.9	× 346 / 2580	−2.3
4	91,652	2450.2	− 2485	−34.8	× 380 / 2580	−5.1
5	91,654	2466.9	− 2528	−61.1	× 330 / 2580	−7.8
6	91,656	2482.3	− 2552	−69.7	× 349 / 2580	−9.4
7	91,658	2506.2	− 2567	−60.8	× 422 / 2580	−9.9
8	91,661	2541.7	− 2586	−44.3	× 370 / 2580	−6.4
11	91,663	2539.6	− 2628	−88.4	× 383 / 2580	−13.1
Sum, rounded to a whole point						−54

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,846	2425.3	− 2436	−10.7	× 313 / 2562	−1.3
4	91,848	2449.1	− 2485	−35.9	× 342 / 2562	−4.8
5	91,850	2471.2	− 2528	−56.8	× 371 / 2562	−8.2
6	91,852	2490.4	− 2552	−61.6	× 339 / 2562	−8.2
7	91,854	2500.3	− 2567	−66.7	× 376 / 2562	−9.8
8	91,856	2531.7	− 2586	−54.3	× 425 / 2562	−9
11	91,858	2556.9	− 2628	−71.1	× 396 / 2562	−11
Sum, rounded to a whole point						−52

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,493	2425.6	− 2436	−10.4	× 326 / 2543	−1.3
4	92,494	2460.9	− 2485	−24.1	× 312 / 2543	−3
5	92,495	2470.3	− 2528	−57.7	× 349 / 2543	−7.9
6	92,496	2495.9	− 2552	−56.1	× 387 / 2543	−8.5
7	92,497	2521.7	− 2567	−45.3	× 366 / 2543	−6.5
8	92,498	2548.7	− 2586	−37.3	× 378 / 2543	−5.5
11	92,499	2555.3	− 2628	−72.7	× 425 / 2543	−12.2
Sum, rounded to a whole point						−45

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,749	2388.9	− 2436	−47.1	× 262 / 2272	−5.4
4	92,750	2422.5	− 2485	−62.5	× 302 / 2272	−8.3
5	92,751	2435.3	− 2528	−92.7	× 311 / 2272	−12.7
6	92,752	2477.9	− 2552	−74.1	× 326 / 2272	−10.6
7	92,753	2507.7	− 2567	−59.3	× 334 / 2272	−8.7
8	92,754	2524.4	− 2586	−61.6	× 382 / 2272	−10.4
11	92,755	2548.8	− 2628	−79.2	× 355 / 2272	−12.4
Sum, rounded to a whole point						−69

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,653	2387.8	− 2436	−48.2	× 269 / 2264	−5.7
4	92,654	2430.2	− 2485	−54.8	× 267 / 2264	−6.5
5	92,655	2441.6	− 2528	−86.4	× 297 / 2264	−11.3
6	92,656	2488.3	− 2552	−63.7	× 323 / 2264	−9.1
7	92,657	2507.9	− 2567	−59.1	× 382 / 2264	−10
8	92,658	2522.1	− 2586	−63.9	× 338 / 2264	−9.5
11	92,659	2526.5	− 2628	−101.5	× 388 / 2264	−17.4
Sum, rounded to a whole point						−70

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,548	2386.6	− 2436	−49.4	× 253 / 2349	−5.3
4	92,549	2430.9	− 2485	−54.1	× 280 / 2349	−6.4
5	92,550	2452.4	− 2528	−75.6	× 281 / 2349	−9
6	92,551	2471.1	− 2552	−80.9	× 318 / 2349	−11
7	92,552	2506.6	− 2567	−60.4	× 376 / 2349	−9.7
8	92,553	2533.0	− 2586	−53	× 403 / 2349	−9.1
11	92,554	2536.8	− 2628	−91.2	× 438 / 2349	−17
Sum, rounded to a whole point						−68

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,274	2385.0	− 2436	−51	× 252 / 2304	−5.6
4	92,275	2426.7	− 2485	−58.3	× 263 / 2304	−6.7
5	92,276	2447.4	− 2528	−80.6	× 284 / 2304	−9.9
6	92,277	2486.2	− 2552	−65.8	× 294 / 2304	−8.4
7	92,278	2511.4	− 2567	−55.6	× 391 / 2304	−9.4
8	92,279	2540.5	− 2586	−45.5	× 392 / 2304	−7.7
11	92,280	2550.7	− 2628	−77.3	× 428 / 2304	−14.4
Sum, rounded to a whole point						−62

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −53, −53, −54, −52, −45, −69, −70, −68, −62 → −58.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 0 · 2016→2017: 1 · 2017→2018: 2 · 2018→2019: 7 · 2019→2022: 24 · 2022→2023: 1 · 2023→2024: 2 · 2024→2025: 6 → average 5.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.4 × 2.66 = 14.4. Upper limit −44, lower limit −72.8.

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.