Pacifica: english · Schoolio

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	82,986	2433.2	− 2432	1.2	× 343 / 2042	0.2
4	82,988	2469.8	− 2473	−3.2	× 344 / 2042	−0.5
5	82,991	2522.8	− 2502	20.8	× 339 / 2042	3.5
6	82,992	2524.4	− 2531	−6.6	× 349 / 2042	−1.1
7	82,995	2565.1	− 2552	13.1	× 358 / 2042	2.3
8	82,996	2586.7	− 2567	19.7	× 309 / 2042	3
Sum, rounded to a whole point						7

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,953	2434.1	− 2432	2.1	× 340 / 2099	0.3
4	76,955	2473.9	− 2473	0.9	× 348 / 2099	0.1
5	76,957	2519.3	− 2502	17.3	× 349 / 2099	2.9
6	76,958	2544.2	− 2531	13.2	× 351 / 2099	2.2
7	76,960	2561.1	− 2552	9.1	× 351 / 2099	1.5
8	76,962	2585.3	− 2567	18.3	× 360 / 2099	3.1
Sum, rounded to a whole point						10

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,038	2432.5	− 2432	0.5	× 306 / 2027	0.1
4	79,039	2464.7	− 2473	−8.3	× 332 / 2027	−1.4
5	79,042	2512.4	− 2502	10.4	× 351 / 2027	1.8
6	79,044	2548.7	− 2531	17.7	× 343 / 2027	3
7	79,046	2583.0	− 2552	31	× 347 / 2027	5.3
8	79,048	2592.4	− 2567	25.4	× 348 / 2027	4.4
Sum, rounded to a whole point						13

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,181	2437.7	− 2432	5.7	× 280 / 1977	0.8
4	79,182	2479.1	− 2473	6.1	× 316 / 1977	1
5	79,185	2519.5	− 2502	17.5	× 342 / 1977	3
6	79,186	2547.2	− 2531	16.2	× 351 / 1977	2.9
7	79,189	2573.2	− 2552	21.2	× 341 / 1977	3.7
8	79,190	2607.8	− 2567	40.8	× 347 / 1977	7.2
Sum, rounded to a whole point						19

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,704	2440.4	− 2432	8.4	× 353 / 1987	1.5
4	79,705	2475.1	− 2473	2.1	× 257 / 1987	0.3
5	79,706	2526.9	− 2502	24.9	× 320 / 1987	4
6	79,707	2551.0	− 2531	20	× 353 / 1987	3.6
7	79,708	2571.8	− 2552	19.8	× 355 / 1987	3.5
8	79,709	2597.3	− 2567	30.3	× 349 / 1987	5.3
Sum, rounded to a whole point						18

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,193	2427.4	− 2432	−4.6	× 217 / 1399	−0.7
4	78,194	2456.2	− 2473	−16.8	× 251 / 1399	−3
5	78,195	2504.4	− 2502	2.4	× 275 / 1399	0.5
6	78,196	2542.4	− 2531	11.4	× 176 / 1399	1.4
7	78,197	2577.5	− 2552	25.5	× 241 / 1399	4.4
8	78,198	2585.1	− 2567	18.1	× 239 / 1399	3.1
Sum, rounded to a whole point						6

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,948	2416.2	− 2432	−15.8	× 280 / 1693	−2.6
4	79,949	2461.2	− 2473	−11.8	× 265 / 1693	−1.8
5	79,950	2511.1	− 2502	9.1	× 307 / 1693	1.7
6	79,951	2538.0	− 2531	7	× 312 / 1693	1.3
7	79,952	2567.2	− 2552	15.2	× 245 / 1693	2.2
8	79,953	2578.6	− 2567	11.6	× 284 / 1693	1.9
Sum, rounded to a whole point						3

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,918	2429.8	− 2432	−2.2	× 300 / 1707	−0.4
4	79,919	2441.1	− 2473	−31.9	× 279 / 1707	−5.2
5	79,920	2507.5	− 2502	5.5	× 263 / 1707	0.8
6	79,921	2530.8	− 2531	−0.2	× 308 / 1707	0
7	79,922	2569.6	− 2552	17.6	× 313 / 1707	3.2
8	79,923	2579.9	− 2567	12.9	× 244 / 1707	1.8
Sum, rounded to a whole point						0

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,944	2435.9	− 2432	3.9	× 289 / 1719	0.7
4	79,945	2450.7	− 2473	−22.3	× 288 / 1719	−3.7
5	79,946	2494.4	− 2502	−7.6	× 281 / 1719	−1.2
6	79,947	2542.5	− 2531	11.5	× 256 / 1719	1.7
7	79,948	2559.5	− 2552	7.5	× 297 / 1719	1.3
8	79,949	2589.2	− 2567	22.2	× 308 / 1719	4
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	79,610	2421.1	− 2432	−10.9	× 272 / 1684	−1.8
4	79,611	2471.0	− 2473	−2	× 292 / 1684	−0.3
5	79,612	2511.0	− 2502	9	× 286 / 1684	1.5
6	79,613	2532.6	− 2531	1.6	× 277 / 1684	0.3
7	79,614	2557.0	− 2552	5	× 261 / 1684	0.8
8	79,615	2584.0	− 2567	17	× 296 / 1684	3
Sum, rounded to a whole point						3

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 7, 10, 13, 19, 18, 6, 3, 0, 3, 3 → 8.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 3 · 2017→2018: 6 · 2018→2019: 1 · 2019→2021: 12 · 2021→2022: 3 · 2022→2023: 3 · 2023→2024: 3 · 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 18.3, lower limit −1.9.

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.