County Collaborative 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
4	72,634	2413.6	− 2473	−59.4	× 16 / 110	−8.6
5	72,636	2505.9	− 2502	3.9	× 15 / 110	0.5
6	72,638	2490.1	− 2531	−40.9	× 16 / 110	−5.9
7	72,640	2501.2	− 2552	−50.8	× 19 / 110	−8.8
8	72,642	2519.5	− 2567	−47.5	× 15 / 110	−6.5
11	72,644	2483.3	− 2583	−99.7	× 29 / 110	−26.3
Sum, rounded to a whole point						−56

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	67,419	2487.3	− 2473	14.3	× 18 / 18	14.3
Sum, rounded to a whole point						14

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	69,365	2448.7	− 2432	16.7	× 22 / 169	2.2
4	69,367	2501.2	− 2473	28.2	× 29 / 169	4.8
5	69,369	2558.0	− 2502	56	× 24 / 169	8
6	69,370	2597.8	− 2531	66.8	× 26 / 169	10.3
7	69,373	2572.8	− 2552	20.8	× 19 / 169	2.3
8	69,375	2576.7	− 2567	9.7	× 22 / 169	1.3
11	69,376	2524.4	− 2583	−58.6	× 27 / 169	−9.4
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
11	69,870	2542.0	− 2583	−41	× 12 / 12	−41
Sum, rounded to a whole point						−41

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	69,952	2476.6	− 2531	−54.4	× 15 / 80	−10.2
7	69,953	2479.9	− 2552	−72.1	× 21 / 80	−18.9
8	69,954	2495.5	− 2567	−71.5	× 19 / 80	−17
11	69,955	2562.2	− 2583	−20.8	× 25 / 80	−6.5
Sum, rounded to a whole point						−53

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	69,966	2505.2	− 2552	−46.8	× 25 / 78	−15
8	69,967	2469.8	− 2567	−97.2	× 18 / 78	−22.4
11	69,968	2546.0	− 2583	−37	× 35 / 78	−16.6
Sum, rounded to a whole point						−54

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	69,943	2468.5	− 2552	−83.5	× 21 / 100	−17.5
8	69,944	2443.6	− 2567	−123.4	× 34 / 100	−42
11	69,945	2514.0	− 2583	−69	× 45 / 100	−31.1
Sum, rounded to a whole point						−91

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	69,655	2500.9	− 2552	−51.1	× 14 / 94	−7.6
8	69,656	2493.7	− 2567	−73.3	× 20 / 94	−15.6
11	69,657	2497.4	− 2583	−85.6	× 60 / 94	−54.6
Sum, rounded to a whole point						−78

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −56, 14, 19, −41, −53, −54, −91, −78 → −42.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 70 · 2016→2018: 5 · 2018→2019: 60 · 2019→2022: 12 · 2022→2023: 1 · 2023→2024: 37 · 2024→2025: 13 → average 28.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 28.3 × 2.66 = 75.3. Upper limit 32.8, lower limit −117.8.

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.