Oak Hill 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	62,873	2408.6	− 2436	−27.4	× 115 / 455	−6.9
4	62,875	2465.3	− 2485	−19.7	× 124 / 455	−5.4
5	62,877	2477.1	− 2528	−50.9	× 94 / 455	−10.5
6	62,879	2498.7	− 2552	−53.3	× 122 / 455	−14.3
Sum, rounded to a whole point						−37

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,326	2425.3	− 2436	−10.7	× 106 / 451	−2.5
4	58,327	2445.4	− 2485	−39.6	× 128 / 451	−11.2
5	58,330	2482.7	− 2528	−45.3	× 122 / 451	−12.3
6	58,332	2506.2	− 2552	−45.8	× 95 / 451	−9.6
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	60,013	2420.1	− 2436	−15.9	× 100 / 460	−3.5
4	60,014	2461.3	− 2485	−23.7	× 118 / 460	−6.1
5	60,016	2474.4	− 2528	−53.6	× 122 / 460	−14.2
6	60,019	2513.7	− 2552	−38.3	× 120 / 460	−10
Sum, rounded to a whole point						−34

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,128	2410.8	− 2436	−25.2	× 94 / 434	−5.5
4	60,130	2449.0	− 2485	−36	× 91 / 434	−7.5
5	60,132	2478.6	− 2528	−49.4	× 122 / 434	−13.9
6	60,134	2509.8	− 2552	−42.2	× 127 / 434	−12.3
Sum, rounded to a whole point						−39

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,375	2412.8	− 2436	−23.2	× 108 / 430	−5.8
4	60,376	2449.6	− 2485	−35.4	× 96 / 430	−7.9
5	60,377	2478.3	− 2528	−49.7	× 103 / 430	−11.9
6	60,378	2511.1	− 2552	−40.9	× 123 / 430	−11.7
Sum, rounded to a whole point						−37

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,445	2404.2	− 2436	−31.8	× 114 / 397	−9.1
4	60,446	2444.2	− 2485	−40.8	× 88 / 397	−9
5	60,447	2443.5	− 2528	−84.5	× 98 / 397	−20.9
6	60,448	2478.1	− 2552	−73.9	× 97 / 397	−18.1
Sum, rounded to a whole point						−57

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,396	2411.8	− 2436	−24.2	× 94 / 430	−5.3
4	60,397	2434.6	− 2485	−50.4	× 124 / 430	−14.5
5	60,398	2472.3	− 2528	−55.7	× 94 / 430	−12.2
6	60,399	2478.7	− 2552	−73.3	× 118 / 430	−20.1
Sum, rounded to a whole point						−52

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,339	2405.0	− 2436	−31	× 105 / 414	−7.9
4	60,340	2418.0	− 2485	−67	× 98 / 414	−15.9
5	60,341	2437.2	− 2528	−90.8	× 119 / 414	−26.1
6	60,342	2485.5	− 2552	−66.5	× 92 / 414	−14.8
Sum, rounded to a whole point						−65

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,098	2399.6	− 2436	−36.4	× 106 / 429	−9
4	60,099	2425.5	− 2485	−59.5	× 102 / 429	−14.1
5	60,100	2429.9	− 2528	−98.1	× 101 / 429	−23.1
6	60,101	2463.4	− 2552	−88.6	× 120 / 429	−24.8
Sum, rounded to a whole point						−71

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −37, −36, −34, −39, −37, −57, −52, −65, −71 → −47.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 1 · 2016→2017: 2 · 2017→2018: 5 · 2018→2019: 2 · 2019→2022: 20 · 2022→2023: 5 · 2023→2024: 13 · 2024→2025: 6 → average 6.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.8 × 2.66 = 18.1. Upper limit −29.5, lower limit −65.7.

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.