Central Language Academy: 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	66,615	2367.3	− 2432	−64.7	× 84 / 388	−14
4	66,616	2420.0	− 2473	−53	× 85 / 388	−11.6
5	66,619	2459.1	− 2502	−42.9	× 92 / 388	−10.2
6	66,620	2473.7	− 2531	−57.3	× 76 / 388	−11.2
7	66,623	2510.1	− 2552	−41.9	× 33 / 388	−3.6
8	66,624	2542.8	− 2567	−24.2	× 18 / 388	−1.1
Sum, rounded to a whole point						−52

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,786	2363.9	− 2432	−68.1	× 87 / 394	−15
4	61,788	2438.3	− 2473	−34.7	× 94 / 394	−8.3
5	61,790	2459.1	− 2502	−42.9	× 78 / 394	−8.5
6	61,792	2487.4	− 2531	−43.6	× 78 / 394	−8.6
7	61,793	2554.7	− 2552	2.7	× 29 / 394	0.2
8	61,795	2511.5	− 2567	−55.5	× 28 / 394	−3.9
Sum, rounded to a whole point						−44

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,576	2385.0	− 2432	−47	× 92 / 388	−11.1
4	63,577	2424.9	− 2473	−48.1	× 77 / 388	−9.5
5	63,579	2454.5	− 2502	−47.5	× 86 / 388	−10.5
6	63,581	2476.7	− 2531	−54.3	× 77 / 388	−10.8
7	63,583	2520.1	− 2552	−31.9	× 29 / 388	−2.4
8	63,585	2593.3	− 2567	26.3	× 27 / 388	1.8
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	63,679	2395.6	− 2432	−36.4	× 96 / 391	−8.9
4	63,680	2479.0	− 2473	6	× 88 / 391	1.4
5	63,683	2455.7	− 2502	−46.3	× 71 / 391	−8.4
6	63,684	2501.9	− 2531	−29.1	× 80 / 391	−6
7	63,686	2557.2	− 2552	5.2	× 32 / 391	0.4
8	63,688	2553.4	− 2567	−13.6	× 24 / 391	−0.8
Sum, rounded to a whole point						−22

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,944	2418.8	− 2432	−13.2	× 92 / 413	−2.9
4	63,945	2474.0	− 2473	1	× 94 / 413	0.2
5	63,946	2489.5	− 2502	−12.5	× 88 / 413	−2.7
6	63,947	2509.2	− 2531	−21.8	× 66 / 413	−3.5
7	63,948	2565.7	− 2552	13.7	× 40 / 413	1.3
8	63,949	2591.4	− 2567	24.4	× 33 / 413	1.9
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	64,033	2384.0	− 2432	−48	× 90 / 433	−10
4	64,034	2463.2	− 2473	−9.8	× 89 / 433	−2
5	64,035	2482.4	− 2502	−19.6	× 85 / 433	−3.8
6	64,036	2517.5	− 2531	−13.5	× 80 / 433	−2.5
7	64,037	2589.1	− 2552	37.1	× 52 / 433	4.5
8	64,038	2631.4	− 2567	64.4	× 37 / 433	5.5
Sum, rounded to a whole point						−8

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,016	2385.7	− 2432	−46.3	× 82 / 429	−8.8
4	64,017	2454.5	− 2473	−18.5	× 84 / 429	−3.6
5	64,018	2475.5	− 2502	−26.5	× 88 / 429	−5.4
6	64,019	2519.0	− 2531	−12	× 85 / 429	−2.4
7	64,020	2585.9	− 2552	33.9	× 40 / 429	3.2
8	64,021	2609.7	− 2567	42.7	× 50 / 429	5
Sum, rounded to a whole point						−12

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,990	2375.1	− 2432	−56.9	× 91 / 434	−11.9
4	63,991	2444.6	− 2473	−28.4	× 85 / 434	−5.6
5	63,992	2470.0	− 2502	−32	× 87 / 434	−6.4
6	63,993	2534.8	− 2531	3.8	× 83 / 434	0.7
7	63,994	2574.1	− 2552	22.1	× 47 / 434	2.4
8	63,995	2615.4	− 2567	48.4	× 41 / 434	4.6
Sum, rounded to a whole point						−16

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,752	2387.1	− 2432	−44.9	× 88 / 427	−9.3
4	63,753	2453.7	− 2473	−19.3	× 83 / 427	−3.8
5	63,754	2501.5	− 2502	−0.5	× 77 / 427	−0.1
6	63,755	2507.2	− 2531	−23.8	× 79 / 427	−4.4
7	63,756	2582.4	− 2552	30.4	× 56 / 427	4
8	63,757	2590.8	− 2567	23.8	× 44 / 427	2.5
Sum, rounded to a whole point						−11

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −52, −44, −43, −22, −6, −8, −12, −16, −11 → −23.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 8 · 2016→2017: 1 · 2017→2018: 21 · 2018→2019: 16 · 2019→2022: 2 · 2022→2023: 4 · 2023→2024: 4 · 2024→2025: 5 → average 7.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.6 × 2.66 = 20.2. Upper limit −3.6, lower limit −44.

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.