Darnall Charter: 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	74,207	2409.5	− 2432	−22.5	× 83 / 393	−4.8
4	74,209	2418.7	− 2473	−54.3	× 72 / 393	−9.9
5	74,211	2452.3	− 2502	−49.7	× 82 / 393	−10.4
6	74,213	2484.8	− 2531	−46.2	× 73 / 393	−8.6
7	74,215	2524.6	− 2552	−27.4	× 53 / 393	−3.7
8	74,217	2520.4	− 2567	−46.6	× 30 / 393	−3.6
Sum, rounded to a whole point						−41

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	68,920	2375.0	− 2432	−57	× 77 / 404	−10.9
4	68,923	2431.4	− 2473	−41.6	× 79 / 404	−8.1
5	68,924	2464.7	− 2502	−37.3	× 71 / 404	−6.6
6	68,926	2495.2	− 2531	−35.8	× 70 / 404	−6.2
7	68,929	2501.8	− 2552	−50.2	× 62 / 404	−7.7
8	68,931	2551.0	− 2567	−16	× 45 / 404	−1.8
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	70,754	2400.5	− 2432	−31.5	× 72 / 419	−5.4
4	70,755	2417.5	− 2473	−55.5	× 79 / 419	−10.5
5	70,757	2471.2	− 2502	−30.8	× 79 / 419	−5.8
6	70,759	2496.3	− 2531	−34.7	× 68 / 419	−5.6
7	70,761	2530.3	− 2552	−21.7	× 68 / 419	−3.5
8	70,764	2561.5	− 2567	−5.5	× 53 / 419	−0.7
Sum, rounded to a whole point						−32

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	70,901	2423.1	− 2432	−8.9	× 72 / 423	−1.5
4	70,903	2447.5	− 2473	−25.5	× 75 / 423	−4.5
5	70,905	2454.7	− 2502	−47.3	× 70 / 423	−7.8
6	70,907	2501.7	− 2531	−29.3	× 74 / 423	−5.1
7	70,909	2519.2	− 2552	−32.8	× 63 / 423	−4.9
8	70,911	2534.6	− 2567	−32.4	× 69 / 423	−5.3
Sum, rounded to a whole point						−29

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	71,384	2414.9	− 2432	−17.1	× 76 / 423	−3.1
4	71,385	2448.4	− 2473	−24.6	× 73 / 423	−4.2
5	71,386	2509.8	− 2502	7.8	× 77 / 423	1.4
6	71,387	2487.3	− 2531	−43.7	× 70 / 423	−7.2
7	71,388	2489.1	− 2552	−62.9	× 67 / 423	−10
8	71,389	2505.6	− 2567	−61.4	× 60 / 423	−8.7
Sum, rounded to a whole point						−32

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	71,484	2402.7	− 2432	−29.3	× 51 / 317	−4.7
4	71,485	2423.5	− 2473	−49.5	× 42 / 317	−6.6
5	71,486	2456.6	− 2502	−45.4	× 58 / 317	−8.3
6	71,487	2480.3	− 2531	−50.7	× 61 / 317	−9.8
7	71,488	2499.2	− 2552	−52.8	× 55 / 317	−9.2
8	71,489	2548.7	− 2567	−18.3	× 50 / 317	−2.9
Sum, rounded to a whole point						−41

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	71,478	2356.0	− 2432	−76	× 54 / 296	−13.9
4	71,479	2387.2	− 2473	−85.8	× 49 / 296	−14.2
5	71,480	2492.8	− 2502	−9.2	× 40 / 296	−1.2
6	71,481	2470.2	− 2531	−60.8	× 53 / 296	−10.9
7	71,482	2523.7	− 2552	−28.3	× 49 / 296	−4.7
8	71,483	2536.6	− 2567	−30.4	× 51 / 296	−5.2
Sum, rounded to a whole point						−50

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	71,460	2334.3	− 2432	−97.7	× 42 / 298	−13.8
4	71,461	2356.4	− 2473	−116.6	× 57 / 298	−22.3
5	71,462	2480.3	− 2502	−21.7	× 48 / 298	−3.5
6	71,463	2472.3	− 2531	−58.7	× 40 / 298	−7.9
7	71,464	2483.1	− 2552	−68.9	× 50 / 298	−11.6
8	71,465	2501.6	− 2567	−65.4	× 61 / 298	−13.4
Sum, rounded to a whole point						−72

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	71,176	2314.5	− 2432	−117.5	× 42 / 289	−17.1
4	71,177	2362.1	− 2473	−110.9	× 47 / 289	−18
5	71,178	2454.3	− 2502	−47.7	× 60 / 289	−9.9
6	71,179	2454.9	− 2531	−76.1	× 48 / 289	−12.6
7	71,180	2492.1	− 2552	−59.9	× 44 / 289	−9.1
8	71,181	2529.8	− 2567	−37.2	× 48 / 289	−6.2
Sum, rounded to a whole point						−73

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −41, −41, −32, −29, −32, −41, −50, −72, −73 → −45.7
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: 9 · 2017→2018: 3 · 2018→2019: 3 · 2019→2022: 9 · 2022→2023: 9 · 2023→2024: 22 · 2024→2025: 1 → average 7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7 × 2.66 = 18.6. Upper limit −27.1, lower limit −64.3.

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.