Trivium 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	84,461	2414.6	− 2432	−17.4	× 49 / 303	−2.8
4	84,463	2464.8	− 2473	−8.2	× 58 / 303	−1.6
5	84,465	2517.1	− 2502	15.1	× 61 / 303	3
6	84,467	2538.0	− 2531	7	× 48 / 303	1.1
7	84,470	2547.2	− 2552	−4.8	× 38 / 303	−0.6
8	84,471	2593.9	− 2567	26.9	× 49 / 303	4.4
Sum, rounded to a whole point						4

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,269	2410.9	− 2432	−21.1	× 62 / 335	−3.9
4	78,270	2452.8	− 2473	−20.2	× 62 / 335	−3.7
5	78,273	2494.9	− 2502	−7.1	× 49 / 335	−1
6	78,274	2549.5	− 2531	18.5	× 51 / 335	2.8
7	78,276	2574.7	− 2552	22.7	× 58 / 335	3.9
8	78,278	2578.8	− 2567	11.8	× 40 / 335	1.4
11	78,280	2654.2	− 2583	71.2	× 13 / 335	2.8
Sum, rounded to a whole point						2

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,425	2414.9	− 2432	−17.1	× 74 / 387	−3.3
4	80,428	2461.9	− 2473	−11.1	× 70 / 387	−2
5	80,429	2519.0	− 2502	17	× 73 / 387	3.2
6	80,432	2525.8	− 2531	−5.2	× 46 / 387	−0.6
7	80,434	2588.2	− 2552	36.2	× 61 / 387	5.7
8	80,436	2582.6	− 2567	15.6	× 47 / 387	1.9
11	80,438	2638.7	− 2583	55.7	× 16 / 387	2.3
Sum, rounded to a whole point						7

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,583	2398.0	− 2432	−34	× 49 / 380	−4.4
4	80,584	2462.5	− 2473	−10.5	× 75 / 380	−2.1
5	80,587	2521.6	− 2502	19.6	× 67 / 380	3.5
6	80,588	2550.7	− 2531	19.7	× 62 / 380	3.2
7	80,591	2539.9	− 2552	−12.1	× 50 / 380	−1.6
8	80,592	2610.4	− 2567	43.4	× 53 / 380	6.1
11	80,595	2632.0	− 2583	49	× 24 / 380	3.1
Sum, rounded to a whole point						8

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,063	2421.4	− 2432	−10.6	× 25 / 159	−1.7
4	81,064	2442.3	− 2473	−30.7	× 18 / 159	−3.5
5	81,065	2507.1	− 2502	5.1	× 31 / 159	1
6	81,066	2549.8	− 2531	18.8	× 23 / 159	2.7
7	81,067	2603.7	− 2552	51.7	× 27 / 159	8.8
8	81,068	2580.6	− 2567	13.6	× 19 / 159	1.6
11	81,069	2657.3	− 2583	74.3	× 16 / 159	7.5
Sum, rounded to a whole point						16

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,276	2421.0	− 2432	−11	× 23 / 171	−1.5
4	81,277	2458.5	− 2473	−14.5	× 31 / 171	−2.6
5	81,278	2472.2	− 2502	−29.8	× 26 / 171	−4.5
6	81,279	2529.1	− 2531	−1.9	× 28 / 171	−0.3
7	81,280	2530.4	− 2552	−21.6	× 19 / 171	−2.4
8	81,281	2558.4	− 2567	−8.6	× 25 / 171	−1.3
11	81,282	2568.8	− 2583	−14.2	× 19 / 171	−1.6
Sum, rounded to a whole point						−14

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,238	2401.9	− 2432	−30.1	× 24 / 149	−4.8
4	81,239	2440.4	− 2473	−32.6	× 28 / 149	−6.1
5	81,240	2494.5	− 2502	−7.5	× 30 / 149	−1.5
6	81,241	2499.3	− 2531	−31.7	× 20 / 149	−4.3
7	81,242	2567.1	− 2552	15.1	× 29 / 149	2.9
8	81,243	2544.1	− 2567	−22.9	× 18 / 149	−2.8
Sum, rounded to a whole point						−17

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,250	2372.4	− 2432	−59.6	× 31 / 175	−10.6
4	81,251	2464.9	− 2473	−8.1	× 22 / 175	−1
5	81,252	2494.0	− 2502	−8	× 24 / 175	−1.1
6	81,253	2531.1	− 2531	0.1	× 22 / 175	0
7	81,254	2541.3	− 2552	−10.7	× 27 / 175	−1.7
8	81,255	2533.3	− 2567	−33.7	× 32 / 175	−6.2
11	81,256	2619.8	− 2583	36.8	× 17 / 175	3.6
Sum, rounded to a whole point						−17

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,918	2397.5	− 2432	−34.5	× 28 / 177	−5.5
4	80,919	2436.3	− 2473	−36.7	× 34 / 177	−7
5	80,920	2517.2	− 2502	15.2	× 23 / 177	2
6	80,921	2512.1	− 2531	−18.9	× 24 / 177	−2.6
7	80,922	2536.8	− 2552	−15.2	× 22 / 177	−1.9
8	80,923	2559.0	− 2567	−8	× 28 / 177	−1.3
11	80,924	2574.1	− 2583	−8.9	× 18 / 177	−0.9
Sum, rounded to a whole point						−17

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 4, 2, 7, 8, 16, −14, −17, −17, −17 → −3.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 5 · 2017→2018: 1 · 2018→2019: 8 · 2019→2022: 30 · 2022→2023: 3 · 2023→2024: 0 · 2024→2025: 0 → average 6.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.1 × 2.66 = 16.2. Upper limit 13.1, lower limit −19.3.

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.