Voices College-Bound Language Academy: math

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	87,156	2358.1	− 2436	−77.9	× 59 / 283	−16.2
4	87,158	2433.0	− 2485	−52	× 52 / 283	−9.6
5	87,160	2478.4	− 2528	−49.6	× 52 / 283	−9.1
6	87,162	2509.0	− 2552	−43	× 53 / 283	−8.1
7	87,164	2603.7	− 2567	36.7	× 39 / 283	5.1
8	87,166	2685.1	− 2586	99.1	× 28 / 283	9.8
Sum, rounded to a whole point						−28

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,883	2434.2	− 2436	−1.8	× 53 / 302	−0.3
4	80,885	2461.4	− 2485	−23.6	× 56 / 302	−4.4
5	80,887	2489.8	− 2528	−38.2	× 54 / 302	−6.8
6	80,889	2493.5	− 2552	−58.5	× 56 / 302	−10.8
7	80,891	2547.5	− 2567	−19.5	× 44 / 302	−2.8
8	80,894	2668.9	− 2586	82.9	× 39 / 302	10.7
Sum, rounded to a whole point						−15

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,111	2442.4	− 2436	6.4	× 55 / 311	1.1
4	83,113	2478.5	− 2485	−6.5	× 54 / 311	−1.1
5	83,116	2492.3	− 2528	−35.7	× 56 / 311	−6.4
6	83,118	2496.5	− 2552	−55.5	× 53 / 311	−9.5
7	83,119	2512.2	− 2567	−54.8	× 51 / 311	−9
8	83,122	2576.3	− 2586	−9.7	× 42 / 311	−1.3
Sum, rounded to a whole point						−26

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,328	2463.4	− 2436	27.4	× 56 / 301	5.1
4	83,330	2492.7	− 2485	7.7	× 52 / 301	1.3
5	83,332	2555.5	− 2528	27.5	× 51 / 301	4.7
6	83,334	2522.9	− 2552	−29.1	× 51 / 301	−4.9
7	83,336	2537.8	− 2567	−29.2	× 45 / 301	−4.4
8	83,338	2552.5	− 2586	−33.5	× 46 / 301	−5.1
Sum, rounded to a whole point						−3

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,944	2422.0	− 2436	−14	× 54 / 305	−2.5
4	83,945	2484.5	− 2485	−0.5	× 53 / 305	−0.1
5	83,946	2495.4	− 2528	−32.6	× 54 / 305	−5.8
6	83,947	2545.4	− 2552	−6.6	× 50 / 305	−1.1
7	83,948	2549.8	− 2567	−17.2	× 51 / 305	−2.9
8	83,949	2578.3	− 2586	−7.7	× 43 / 305	−1.1
Sum, rounded to a whole point						−13

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,119	2393.4	− 2436	−42.6	× 46 / 256	−7.7
4	84,120	2424.6	− 2485	−60.4	× 42 / 256	−9.9
5	84,121	2486.4	− 2528	−41.6	× 47 / 256	−7.6
6	84,122	2503.4	− 2552	−48.6	× 41 / 256	−7.8
7	84,123	2511.3	− 2567	−55.7	× 41 / 256	−8.9
8	84,124	2537.8	− 2586	−48.2	× 39 / 256	−7.3
Sum, rounded to a whole point						−49

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,060	2391.5	− 2436	−44.5	× 45 / 236	−8.5
4	84,061	2390.8	− 2485	−94.2	× 39 / 236	−15.6
5	84,062	2464.8	− 2528	−63.2	× 41 / 236	−11
6	84,063	2488.4	− 2552	−63.6	× 46 / 236	−12.4
7	84,064	2498.9	− 2567	−68.1	× 26 / 236	−7.5
8	84,065	2503.4	− 2586	−82.6	× 39 / 236	−13.7
Sum, rounded to a whole point						−69

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,061	2387.5	− 2436	−48.5	× 36 / 212	−8.2
4	84,062	2393.0	− 2485	−92	× 43 / 212	−18.7
5	84,063	2420.4	− 2528	−107.6	× 39 / 212	−19.8
6	84,064	2459.9	− 2552	−92.1	× 33 / 212	−14.3
7	84,065	2489.2	− 2567	−77.8	× 37 / 212	−13.6
8	84,066	2503.6	− 2586	−82.4	× 24 / 212	−9.3
Sum, rounded to a whole point						−84

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,743	2405.5	− 2436	−30.5	× 22 / 193	−3.5
4	83,744	2434.8	− 2485	−50.2	× 36 / 193	−9.4
5	83,745	2461.6	− 2528	−66.4	× 37 / 193	−12.7
6	83,746	2446.5	− 2552	−105.5	× 42 / 193	−23
7	83,747	2465.5	− 2567	−101.5	× 22 / 193	−11.6
8	83,748	2504.6	− 2586	−81.4	× 34 / 193	−14.3
Sum, rounded to a whole point						−74

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −28, −15, −26, −3, −13, −49, −69, −84, −74 → −40.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 13 · 2016→2017: 11 · 2017→2018: 23 · 2018→2019: 10 · 2019→2022: 36 · 2022→2023: 20 · 2023→2024: 15 · 2024→2025: 10 → average 17.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 17.3 × 2.66 = 46. Upper limit 5.9, lower limit −86.1.

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.