Jean Callison Elementary: 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	93,454	2411.2	− 2436	−24.8	× 129 / 546	−5.9
4	93,456	2459.6	− 2485	−25.4	× 146 / 546	−6.8
5	93,459	2466.5	− 2528	−61.5	× 138 / 546	−15.5
6	93,460	2511.5	− 2552	−40.5	× 133 / 546	−9.9
Sum, rounded to a whole point						−38

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,842	2404.8	− 2436	−31.2	× 146 / 547	−8.3
4	86,843	2457.5	− 2485	−27.5	× 128 / 547	−6.4
5	86,846	2475.9	− 2528	−52.1	× 136 / 547	−13
6	86,847	2520.3	− 2552	−31.7	× 137 / 547	−7.9
Sum, rounded to a whole point						−36

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,289	2389.5	− 2436	−46.5	× 100 / 440	−10.6
4	89,291	2460.7	− 2485	−24.3	× 115 / 440	−6.4
5	89,292	2459.7	− 2528	−68.3	× 98 / 440	−15.2
6	89,294	2523.2	− 2552	−28.8	× 127 / 440	−8.3
Sum, rounded to a whole point						−40

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,499	2402.6	− 2436	−33.4	× 99 / 420	−7.9
4	89,500	2465.9	− 2485	−19.1	× 99 / 420	−4.5
5	89,503	2476.5	− 2528	−51.5	× 117 / 420	−14.3
6	89,504	2495.1	− 2552	−56.9	× 105 / 420	−14.2
Sum, rounded to a whole point						−41

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,106	2408.1	− 2436	−27.9	× 97 / 405	−6.7
4	90,107	2467.1	− 2485	−17.9	× 101 / 405	−4.5
5	90,108	2470.9	− 2528	−57.1	× 98 / 405	−13.8
6	90,109	2502.9	− 2552	−49.1	× 109 / 405	−13.2
Sum, rounded to a whole point						−38

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,370	2411.3	− 2436	−24.7	× 81 / 373	−5.4
4	90,371	2458.1	− 2485	−26.9	× 100 / 373	−7.2
5	90,372	2465.3	− 2528	−62.7	× 94 / 373	−15.8
6	90,373	2478.5	− 2552	−73.5	× 98 / 373	−19.3
Sum, rounded to a whole point						−48

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,262	2419.4	− 2436	−16.6	× 99 / 381	−4.3
4	90,263	2434.8	− 2485	−50.2	× 86 / 381	−11.3
5	90,264	2469.4	− 2528	−58.6	× 101 / 381	−15.5
6	90,265	2477.0	− 2552	−75	× 95 / 381	−18.7
Sum, rounded to a whole point						−50

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,211	2415.3	− 2436	−20.7	× 92 / 388	−4.9
4	90,212	2435.9	− 2485	−49.1	× 106 / 388	−13.4
5	90,213	2464.9	− 2528	−63.1	× 91 / 388	−14.8
6	90,214	2495.9	− 2552	−56.1	× 99 / 388	−14.3
Sum, rounded to a whole point						−47

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,895	2404.1	− 2436	−31.9	× 131 / 400	−10.4
4	89,896	2435.6	− 2485	−49.4	× 87 / 400	−10.7
5	89,897	2466.1	− 2528	−61.9	× 111 / 400	−17.2
6	89,898	2473.7	− 2552	−78.3	× 71 / 400	−13.9
Sum, rounded to a whole point						−52

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −38, −36, −40, −41, −38, −48, −50, −47, −52 → −43.3
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: 4 · 2017→2018: 1 · 2018→2019: 3 · 2019→2022: 10 · 2022→2023: 2 · 2023→2024: 3 · 2024→2025: 5 → average 3.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 3.8 × 2.66 = 10.1. Upper limit −33.2, lower limit −53.4.

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.