Charter Oak 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	22,134	2406.0	− 2432	−26	× 313 / 2597	−3.1
4	22,136	2438.7	− 2473	−34.3	× 356 / 2597	−4.7
5	22,138	2497.2	− 2502	−4.8	× 361 / 2597	−0.7
6	22,140	2510.0	− 2531	−21	× 380 / 2597	−3.1
7	22,142	2523.2	− 2552	−28.8	× 357 / 2597	−4
8	22,144	2547.3	− 2567	−19.7	× 359 / 2597	−2.7
11	22,146	2603.8	− 2583	20.8	× 471 / 2597	3.8
Sum, rounded to a whole point						−14

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	20,865	2427.8	− 2432	−4.2	× 368 / 2536	−0.6
4	20,866	2461.1	− 2473	−11.9	× 326 / 2536	−1.5
5	20,868	2503.8	− 2502	1.8	× 353 / 2536	0.3
6	20,871	2548.8	− 2531	17.8	× 363 / 2536	2.5
7	20,872	2517.6	− 2552	−34.4	× 343 / 2536	−4.7
8	20,874	2555.5	− 2567	−11.5	× 355 / 2536	−1.6
11	20,876	2597.3	− 2583	14.3	× 428 / 2536	2.4
Sum, rounded to a whole point						−3

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,211	2438.4	− 2432	6.4	× 320 / 2563	0.8
4	21,213	2462.6	− 2473	−10.4	× 373 / 2563	−1.5
5	21,214	2493.2	− 2502	−8.8	× 361 / 2563	−1.2
6	21,217	2531.2	− 2531	0.2	× 377 / 2563	0
7	21,218	2551.3	− 2552	−0.7	× 354 / 2563	−0.1
8	21,221	2546.8	− 2567	−20.2	× 352 / 2563	−2.8
11	21,222	2586.2	− 2583	3.2	× 426 / 2563	0.5
Sum, rounded to a whole point						−4

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,192	2449.5	− 2432	17.5	× 306 / 2449	2.2
4	21,194	2466.7	− 2473	−6.3	× 322 / 2449	−0.8
5	21,196	2503.1	− 2502	1.1	× 366 / 2449	0.2
6	21,198	2537.6	− 2531	6.6	× 336 / 2449	0.9
7	21,199	2534.9	− 2552	−17.1	× 367 / 2449	−2.6
8	21,202	2578.4	− 2567	11.4	× 366 / 2449	1.7
11	21,203	2574.2	− 2583	−8.8	× 386 / 2449	−1.4
Sum, rounded to a whole point						0

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,359	2437.2	− 2432	5.2	× 324 / 2389	0.7
4	21,360	2485.1	− 2473	12.1	× 313 / 2389	1.6
5	21,361	2515.6	− 2502	13.6	× 331 / 2389	1.9
6	21,362	2535.4	− 2531	4.4	× 356 / 2389	0.7
7	21,363	2550.2	− 2552	−1.8	× 326 / 2389	−0.2
8	21,364	2569.8	− 2567	2.8	× 368 / 2389	0.4
11	21,365	2605.0	− 2583	22	× 371 / 2389	3.4
Sum, rounded to a whole point						8

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	20,828	2598.2	− 2583	15.2	× 170 / 170	15.2
Sum, rounded to a whole point						15

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,336	2422.6	− 2432	−9.4	× 287 / 2234	−1.2
4	21,337	2466.6	− 2473	−6.4	× 291 / 2234	−0.8
5	21,338	2487.0	− 2502	−15	× 321 / 2234	−2.2
6	21,339	2528.0	− 2531	−3	× 311 / 2234	−0.4
7	21,340	2550.5	− 2552	−1.5	× 305 / 2234	−0.2
8	21,341	2570.3	− 2567	3.3	× 325 / 2234	0.5
11	21,342	2584.2	− 2583	1.2	× 394 / 2234	0.2
Sum, rounded to a whole point						−4

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,303	2422.3	− 2432	−9.7	× 291 / 2153	−1.3
4	21,304	2462.7	− 2473	−10.3	× 290 / 2153	−1.4
5	21,305	2493.9	− 2502	−8.1	× 311 / 2153	−1.2
6	21,306	2531.8	− 2531	0.8	× 293 / 2153	0.1
7	21,307	2546.3	− 2552	−5.7	× 319 / 2153	−0.8
8	21,308	2582.7	− 2567	15.7	× 310 / 2153	2.3
11	21,309	2593.0	− 2583	10	× 339 / 2153	1.6
Sum, rounded to a whole point						−1

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,171	2420.4	− 2432	−11.6	× 278 / 2143	−1.5
4	21,172	2457.4	− 2473	−15.6	× 306 / 2143	−2.2
5	21,173	2495.1	− 2502	−6.9	× 287 / 2143	−0.9
6	21,174	2540.2	− 2531	9.2	× 318 / 2143	1.4
7	21,175	2529.7	− 2552	−22.3	× 292 / 2143	−3
8	21,176	2575.9	− 2567	8.9	× 330 / 2143	1.4
11	21,177	2597.3	− 2583	14.3	× 332 / 2143	2.2
Sum, rounded to a whole point						−3

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,090	2434.1	− 2432	2.1	× 277 / 2131	0.3
4	21,091	2448.4	− 2473	−24.6	× 295 / 2131	−3.4
5	21,092	2491.0	− 2502	−11	× 310 / 2131	−1.6
6	21,093	2539.9	− 2531	8.9	× 294 / 2131	1.2
7	21,094	2547.9	− 2552	−4.1	× 319 / 2131	−0.6
8	21,095	2570.2	− 2567	3.2	× 298 / 2131	0.4
11	21,096	2587.7	− 2583	4.7	× 338 / 2131	0.7
Sum, rounded to a whole point						−3

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,142	2444.8	− 2432	12.8	× 260 / 2025	1.6
4	21,143	2455.3	− 2473	−17.7	× 271 / 2025	−2.4
5	21,144	2494.5	− 2502	−7.5	× 282 / 2025	−1
6	21,145	2526.9	− 2531	−4.1	× 307 / 2025	−0.6
7	21,146	2567.3	− 2552	15.3	× 290 / 2025	2.2
8	21,147	2580.6	− 2567	13.6	× 312 / 2025	2.1
11	21,148	2573.6	− 2583	−9.4	× 303 / 2025	−1.4
Sum, rounded to a whole point						0

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −14, −3, −4, 0, 8, 15, −4, −1, −3, −3, 0 → −0.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 11 · 2016→2017: 1 · 2017→2018: 4 · 2018→2019: 8 · 2019→2021: 7 · 2021→2022: 19 · 2022→2023: 3 · 2023→2024: 2 · 2024→2025: 0 · 2025→2026: 3 → average 5.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.8 × 2.66 = 15.4. Upper limit 14.6, lower limit −16.2.

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.

Charter Oak Unified