Oak Park 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	104,821	2486.4	− 2436	50.4	× 297 / 2514	6
4	104,822	2531.7	− 2485	46.7	× 318 / 2514	5.9
5	104,825	2562.6	− 2528	34.6	× 344 / 2514	4.7
6	104,826	2571.0	− 2552	19	× 391 / 2514	3
7	104,829	2607.3	− 2567	40.3	× 372 / 2514	6
8	104,830	2624.5	− 2586	38.5	× 394 / 2514	6
11	104,833	2624.6	− 2628	−3.4	× 398 / 2514	−0.5
Sum, rounded to a whole point						31

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	97,361	2493.2	− 2436	57.2	× 248 / 2408	5.9
4	97,363	2541.5	− 2485	56.5	× 325 / 2408	7.6
5	97,365	2570.0	− 2528	42	× 334 / 2408	5.8
6	97,367	2590.2	− 2552	38.2	× 359 / 2408	5.7
7	97,369	2608.8	− 2567	41.8	× 382 / 2408	6.6
8	97,371	2624.6	− 2586	38.6	× 379 / 2408	6.1
11	97,373	2649.4	− 2628	21.4	× 381 / 2408	3.4
Sum, rounded to a whole point						41

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	100,187	2500.1	− 2436	64.1	× 292 / 2420	7.7
4	100,188	2540.9	− 2485	55.9	× 280 / 2420	6.5
5	100,191	2565.8	− 2528	37.8	× 339 / 2420	5.3
6	100,193	2575.3	− 2552	23.3	× 364 / 2420	3.5
7	100,194	2628.6	− 2567	61.6	× 361 / 2420	9.2
8	100,197	2621.0	− 2586	35	× 386 / 2420	5.6
11	100,198	2660.7	− 2628	32.7	× 398 / 2420	5.4
Sum, rounded to a whole point						43

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	100,341	2498.4	− 2436	62.4	× 277 / 2350	7.4
4	100,344	2546.1	− 2485	61.1	× 307 / 2350	8
5	100,345	2570.9	− 2528	42.9	× 296 / 2350	5.4
6	100,348	2581.1	− 2552	29.1	× 343 / 2350	4.2
7	100,349	2622.7	− 2567	55.7	× 365 / 2350	8.7
8	100,352	2629.2	− 2586	43.2	× 362 / 2350	6.7
11	100,353	2681.1	− 2628	53.1	× 400 / 2350	9
Sum, rounded to a whole point						49

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	101,010	2486.9	− 2436	50.9	× 272 / 2362	5.9
4	101,011	2540.9	− 2485	55.9	× 296 / 2362	7
5	101,012	2581.3	− 2528	53.3	× 314 / 2362	7.1
6	101,013	2587.0	− 2552	35	× 356 / 2362	5.3
7	101,014	2634.9	− 2567	67.9	× 356 / 2362	10.2
8	101,015	2623.2	− 2586	37.2	× 383 / 2362	6
11	101,016	2678.4	− 2628	50.4	× 385 / 2362	8.2
Sum, rounded to a whole point						50

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	98,869	2502.7	− 2436	66.7	× 265 / 2121	8.3
4	98,870	2533.0	− 2485	48	× 246 / 2121	5.6
5	98,871	2551.4	− 2528	23.4	× 281 / 2121	3.1
6	98,872	2574.4	− 2552	22.4	× 316 / 2121	3.3
7	98,873	2625.0	− 2567	58	× 348 / 2121	9.5
8	98,874	2631.0	− 2586	45	× 322 / 2121	6.8
11	98,875	2685.9	− 2628	57.9	× 343 / 2121	9.4
Sum, rounded to a whole point						46

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	101,259	2491.5	− 2436	55.5	× 266 / 2158	6.8
4	101,260	2550.6	− 2485	65.6	× 277 / 2158	8.4
5	101,261	2573.5	− 2528	45.5	× 263 / 2158	5.5
6	101,262	2590.2	− 2552	38.2	× 347 / 2158	6.1
7	101,263	2615.3	− 2567	48.3	× 317 / 2158	7.1
8	101,264	2644.0	− 2586	58	× 360 / 2158	9.7
11	101,265	2670.7	− 2628	42.7	× 328 / 2158	6.5
Sum, rounded to a whole point						50

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	101,093	2488.4	− 2436	52.4	× 241 / 2168	5.8
4	101,094	2546.1	− 2485	61.1	× 276 / 2168	7.8
5	101,095	2586.6	− 2528	58.6	× 288 / 2168	7.8
6	101,096	2603.1	− 2552	51.1	× 326 / 2168	7.7
7	101,097	2629.9	− 2567	62.9	× 364 / 2168	10.6
8	101,098	2631.9	− 2586	45.9	× 325 / 2168	6.9
11	101,099	2689.6	− 2628	61.6	× 348 / 2168	9.9
Sum, rounded to a whole point						56

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	100,970	2490.9	− 2436	54.9	× 276 / 2230	6.8
4	100,971	2537.3	− 2485	52.3	× 262 / 2230	6.1
5	100,972	2582.1	− 2528	54.1	× 284 / 2230	6.9
6	100,973	2607.3	− 2552	55.3	× 365 / 2230	9.1
7	100,974	2622.0	− 2567	55	× 338 / 2230	8.3
8	100,975	2633.7	− 2586	47.7	× 372 / 2230	8
11	100,976	2692.0	− 2628	64	× 333 / 2230	9.6
Sum, rounded to a whole point						55

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	100,634	2486.5	− 2436	50.5	× 271 / 2313	5.9
4	100,635	2540.9	− 2485	55.9	× 297 / 2313	7.2
5	100,636	2569.7	− 2528	41.7	× 281 / 2313	5.1
6	100,637	2599.5	− 2552	47.5	× 374 / 2313	7.7
7	100,638	2640.1	− 2567	73.1	× 364 / 2313	11.5
8	100,639	2630.0	− 2586	44	× 345 / 2313	6.6
11	100,640	2694.5	− 2628	66.5	× 381 / 2313	11
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. 31, 41, 43, 49, 50, 46, 50, 56, 55, 55 → 47.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 2 · 2017→2018: 6 · 2018→2019: 1 · 2019→2021: 4 · 2021→2022: 4 · 2022→2023: 6 · 2023→2024: 1 · 2024→2025: 0 → average 3.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 3.8 × 2.66 = 10.1. Upper limit 57.7, lower limit 37.5.

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 — 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.