Vallejo 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	93,522	2414.2	− 2432	−17.8	× 50 / 342	−2.6
4	93,525	2442.1	− 2473	−30.9	× 43 / 342	−3.9
5	93,526	2486.4	− 2502	−15.6	× 57 / 342	−2.6
6	93,529	2506.7	− 2531	−24.3	× 83 / 342	−5.9
7	93,530	2528.8	− 2552	−23.2	× 59 / 342	−4
8	93,533	2529.9	− 2567	−37.1	× 50 / 342	−5.4
Sum, rounded to a whole point						−24

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,896	2426.7	− 2432	−5.3	× 49 / 368	−0.7
4	86,898	2444.5	− 2473	−28.5	× 66 / 368	−5.1
5	86,899	2444.6	− 2502	−57.4	× 59 / 368	−9.2
6	86,901	2525.9	− 2531	−5.1	× 59 / 368	−0.8
7	86,904	2544.1	− 2552	−7.9	× 87 / 368	−1.9
8	86,905	2567.6	− 2567	0.6	× 48 / 368	0.1
Sum, rounded to a whole point						−18

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,342	2402.9	− 2432	−29.1	× 48 / 362	−3.9
4	89,345	2446.1	− 2473	−26.9	× 59 / 362	−4.4
5	89,346	2472.1	− 2502	−29.9	× 63 / 362	−5.2
6	89,349	2503.6	− 2531	−27.4	× 57 / 362	−4.3
7	89,350	2544.4	− 2552	−7.6	× 57 / 362	−1.2
8	89,353	2574.6	− 2567	7.6	× 78 / 362	1.6
Sum, rounded to a whole point						−17

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,553	2435.0	− 2432	3	× 42 / 330	0.4
4	89,554	2456.9	− 2473	−16.1	× 57 / 330	−2.8
5	89,557	2479.4	− 2502	−22.6	× 56 / 330	−3.8
6	89,558	2490.2	− 2531	−40.8	× 60 / 330	−7.4
7	89,560	2512.8	− 2552	−39.2	× 57 / 330	−6.8
8	89,562	2541.5	− 2567	−25.5	× 58 / 330	−4.5
Sum, rounded to a whole point						−25

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,155	2411.7	− 2432	−20.3	× 47 / 317	−3
4	90,156	2427.3	− 2473	−45.7	× 50 / 317	−7.2
5	90,157	2459.8	− 2502	−42.2	× 61 / 317	−8.1
6	90,158	2519.4	− 2531	−11.6	× 43 / 317	−1.6
7	90,159	2515.1	− 2552	−36.9	× 57 / 317	−6.6
8	90,160	2514.4	− 2567	−52.6	× 59 / 317	−9.8
Sum, rounded to a whole point						−36

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,411	2402.6	− 2432	−29.4	× 35 / 248	−4.1
4	90,412	2408.5	− 2473	−64.5	× 38 / 248	−9.9
5	90,413	2443.8	− 2502	−58.2	× 46 / 248	−10.8
6	90,414	2499.8	− 2531	−31.2	× 39 / 248	−4.9
7	90,415	2458.9	− 2552	−93.1	× 48 / 248	−18
8	90,416	2502.4	− 2567	−64.6	× 42 / 248	−10.9
Sum, rounded to a whole point						−59

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,303	2352.3	− 2432	−79.7	× 51 / 307	−13.2
4	90,304	2402.2	− 2473	−70.8	× 41 / 307	−9.5
5	90,305	2414.0	− 2502	−88	× 46 / 307	−13.2
6	90,306	2494.1	− 2531	−36.9	× 55 / 307	−6.6
7	90,307	2494.1	− 2552	−57.9	× 54 / 307	−10.2
8	90,308	2505.7	− 2567	−61.3	× 60 / 307	−12
Sum, rounded to a whole point						−65

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,252	2312.1	− 2432	−119.9	× 48 / 305	−18.9
4	90,253	2388.5	− 2473	−84.5	× 47 / 305	−13
5	90,254	2424.2	− 2502	−77.8	× 46 / 305	−11.7
6	90,255	2451.7	− 2531	−79.3	× 50 / 305	−13
7	90,256	2503.6	− 2552	−48.4	× 55 / 305	−8.7
8	90,257	2514.2	− 2567	−52.8	× 59 / 305	−10.2
Sum, rounded to a whole point						−76

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,936	2328.5	− 2432	−103.5	× 28 / 284	−10.2
4	89,937	2394.9	− 2473	−78.1	× 49 / 284	−13.5
5	89,938	2404.4	− 2502	−97.6	× 39 / 284	−13.4
6	89,939	2456.2	− 2531	−74.8	× 51 / 284	−13.4
7	89,940	2484.2	− 2552	−67.8	× 59 / 284	−14.1
8	89,941	2507.5	− 2567	−59.5	× 58 / 284	−12.2
Sum, rounded to a whole point						−77

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −24, −18, −17, −25, −36, −59, −65, −76, −77 → −44.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2017: 1 · 2017→2018: 8 · 2018→2019: 11 · 2019→2022: 23 · 2022→2023: 6 · 2023→2024: 11 · 2024→2025: 1 → average 8.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.4 × 2.66 = 22.3. Upper limit −21.8, lower limit −66.4.

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.