Caliber: Beta 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	5,788	2401.4	− 2436	−34.6	× 48 / 91	−18.3
6	5,791	2551.4	− 2552	−0.6	× 43 / 91	−0.3
Sum, rounded to a whole point						−19

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	5,254	2408.9	− 2436	−27.1	× 91 / 310	−8
4	5,257	2438.8	− 2485	−46.2	× 86 / 310	−12.8
6	5,258	2479.7	− 2552	−72.3	× 58 / 310	−13.5
7	5,260	2506.6	− 2567	−60.4	× 75 / 310	−14.6
Sum, rounded to a whole point						−49

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	5,367	2424.6	− 2436	−11.4	× 88 / 451	−2.2
4	5,369	2453.3	− 2485	−31.7	× 88 / 451	−6.2
5	5,370	2437.8	− 2528	−90.2	× 80 / 451	−16
6	5,372	2485.3	− 2552	−66.7	× 45 / 451	−6.7
7	5,374	2467.6	− 2567	−99.4	× 82 / 451	−18.1
8	5,377	2534.2	− 2586	−51.8	× 68 / 451	−7.8
Sum, rounded to a whole point						−57

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	5,360	2435.6	− 2436	−0.4	× 97 / 480	−0.1
4	5,362	2452.9	− 2485	−32.1	× 95 / 480	−6.4
5	5,364	2486.1	− 2528	−41.9	× 89 / 480	−7.8
6	5,366	2475.4	− 2552	−76.6	× 83 / 480	−13.2
7	5,368	2481.9	− 2567	−85.1	× 43 / 480	−7.6
8	5,370	2512.6	− 2586	−73.4	× 73 / 480	−11.2
Sum, rounded to a whole point						−46

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	5,413	2434.7	− 2436	−1.3	× 101 / 488	−0.3
4	5,414	2464.3	− 2485	−20.7	× 100 / 488	−4.2
5	5,415	2475.8	− 2528	−52.2	× 91 / 488	−9.7
6	5,416	2506.6	− 2552	−45.4	× 89 / 488	−8.3
7	5,417	2473.7	− 2567	−93.3	× 74 / 488	−14.1
8	5,418	2490.8	− 2586	−95.2	× 33 / 488	−6.4
Sum, rounded to a whole point						−43

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	5,248	2399.0	− 2436	−37	× 90 / 543	−6.1
4	5,249	2414.9	− 2485	−70.1	× 96 / 543	−12.4
5	5,250	2444.4	− 2528	−83.6	× 90 / 543	−13.9
6	5,251	2474.0	− 2552	−78	× 92 / 543	−13.2
7	5,252	2453.6	− 2567	−113.4	× 89 / 543	−18.6
8	5,253	2521.1	− 2586	−64.9	× 86 / 543	−10.3
Sum, rounded to a whole point						−74

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	5,244	2387.8	− 2436	−48.2	× 95 / 547	−8.4
4	5,245	2445.6	− 2485	−39.4	× 99 / 547	−7.1
5	5,246	2428.6	− 2528	−99.4	× 100 / 547	−18.2
6	5,247	2460.6	− 2552	−91.4	× 99 / 547	−16.5
7	5,248	2487.8	− 2567	−79.2	× 84 / 547	−12.2
8	5,249	2535.1	− 2586	−50.9	× 70 / 547	−6.5
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	5,183	2394.9	− 2436	−41.1	× 101 / 572	−7.3
4	5,184	2443.4	− 2485	−41.6	× 98 / 572	−7.1
5	5,185	2439.0	− 2528	−89	× 100 / 572	−15.6
6	5,186	2453.0	− 2552	−99	× 105 / 572	−18.2
7	5,187	2513.7	− 2567	−53.3	× 92 / 572	−8.6
8	5,188	2550.7	− 2586	−35.3	× 76 / 572	−4.7
Sum, rounded to a whole point						−61

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	5,145	2399.8	− 2436	−36.2	× 99 / 583	−6.1
4	5,146	2437.3	− 2485	−47.7	× 108 / 583	−8.8
5	5,147	2433.5	− 2528	−94.5	× 105 / 583	−17
6	5,148	2472.3	− 2552	−79.7	× 102 / 583	−13.9
7	5,149	2503.4	− 2567	−63.6	× 86 / 583	−9.4
8	5,150	2566.6	− 2586	−19.4	× 83 / 583	−2.8
Sum, rounded to a whole point						−58

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −19, −49, −57, −46, −43, −74, −69, −61, −58 → −52.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 30 · 2016→2017: 8 · 2017→2018: 11 · 2018→2019: 3 · 2019→2022: 31 · 2022→2023: 5 · 2023→2024: 8 · 2024→2025: 3 → average 12.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.4 × 2.66 = 33. Upper limit −19.9, lower limit −85.9.

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.