Belvedere Elementary: 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	67,966	2385.4	− 2432	−46.6	× 89 / 333	−12.5
4	67,968	2437.4	− 2473	−35.6	× 88 / 333	−9.4
5	67,970	2489.4	− 2502	−12.6	× 89 / 333	−3.4
6	67,972	2494.9	− 2531	−36.1	× 67 / 333	−7.3
Sum, rounded to a whole point						−32

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,975	2391.5	− 2432	−40.5	× 95 / 367	−10.5
4	62,978	2448.6	− 2473	−24.4	× 102 / 367	−6.8
5	62,980	2467.3	− 2502	−34.7	× 92 / 367	−8.7
6	62,982	2515.7	− 2531	−15.3	× 78 / 367	−3.3
Sum, rounded to a whole point						−29

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,764	2421.3	− 2432	−10.7	× 112 / 403	−3
4	64,766	2465.6	− 2473	−7.4	× 89 / 403	−1.6
5	64,768	2488.8	− 2502	−13.2	× 112 / 403	−3.7
6	64,769	2491.5	− 2531	−39.5	× 90 / 403	−8.8
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	64,853	2443.9	− 2432	11.9	× 86 / 386	2.7
4	64,856	2462.2	− 2473	−10.8	× 105 / 386	−2.9
5	64,857	2487.2	− 2502	−14.8	× 94 / 386	−3.6
6	64,859	2501.3	− 2531	−29.7	× 101 / 386	−7.8
Sum, rounded to a whole point						−12

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,218	2446.7	− 2432	14.7	× 106 / 388	4
4	65,219	2460.9	− 2473	−12.1	× 91 / 388	−2.8
5	65,220	2495.9	− 2502	−6.1	× 113 / 388	−1.8
6	65,221	2502.9	− 2531	−28.1	× 78 / 388	−5.6
Sum, rounded to a whole point						−6

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,309	2398.4	− 2432	−33.6	× 81 / 331	−8.2
4	65,310	2440.9	− 2473	−32.1	× 89 / 331	−8.6
5	65,311	2479.2	− 2502	−22.8	× 83 / 331	−5.7
6	65,312	2473.6	− 2531	−57.4	× 78 / 331	−13.5
Sum, rounded to a whole point						−36

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,314	2383.7	− 2432	−48.3	× 90 / 313	−13.9
4	65,315	2441.6	− 2473	−31.4	× 83 / 313	−8.3
5	65,316	2484.1	− 2502	−17.9	× 84 / 313	−4.8
6	65,317	2485.4	− 2531	−45.6	× 56 / 313	−8.2
Sum, rounded to a whole point						−35

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,282	2411.8	− 2432	−20.2	× 89 / 316	−5.7
4	65,283	2441.3	− 2473	−31.7	× 87 / 316	−8.7
5	65,284	2481.6	− 2502	−20.4	× 84 / 316	−5.4
6	65,285	2494.1	− 2531	−36.9	× 56 / 316	−6.5
Sum, rounded to a whole point						−26

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,042	2379.4	− 2432	−52.6	× 90 / 317	−14.9
4	65,043	2428.2	− 2473	−44.8	× 86 / 317	−12.2
5	65,044	2474.7	− 2502	−27.3	× 85 / 317	−7.3
6	65,045	2483.5	− 2531	−47.5	× 56 / 317	−8.4
Sum, rounded to a whole point						−43

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −32, −29, −17, −12, −6, −36, −35, −26, −43 → −26.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 12 · 2017→2018: 5 · 2018→2019: 6 · 2019→2022: 30 · 2022→2023: 1 · 2023→2024: 9 · 2024→2025: 17 → average 10.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.4 × 2.66 = 27.7. Upper limit 1.5, lower limit −53.9.

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.