Belle Haven 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	83,345	2359.9	− 2432	−72.1	× 58 / 334	−12.5
4	83,346	2379.0	− 2473	−94	× 49 / 334	−13.8
5	83,349	2411.9	− 2502	−90.1	× 50 / 334	−13.5
6	83,351	2416.0	− 2531	−115	× 59 / 334	−20.3
7	83,352	2477.2	− 2552	−74.8	× 57 / 334	−12.8
8	83,355	2456.8	− 2567	−110.2	× 61 / 334	−20.1
Sum, rounded to a whole point						−93

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,276	2341.8	− 2432	−90.2	× 69 / 340	−18.3
4	77,279	2402.4	− 2473	−70.6	× 59 / 340	−12.3
5	77,280	2433.6	− 2502	−68.4	× 54 / 340	−10.9
6	77,283	2473.2	− 2531	−57.8	× 47 / 340	−8
7	77,285	2459.4	− 2552	−92.6	× 54 / 340	−14.7
8	77,287	2491.5	− 2567	−75.5	× 57 / 340	−12.7
Sum, rounded to a whole point						−77

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,411	2383.8	− 2432	−48.2	× 63 / 333	−9.1
4	79,414	2402.1	− 2473	−70.9	× 59 / 333	−12.6
5	79,415	2447.5	− 2502	−54.5	× 53 / 333	−8.7
6	79,418	2482.0	− 2531	−49	× 47 / 333	−6.9
7	79,420	2460.9	− 2552	−91.1	× 51 / 333	−14
8	79,422	2456.4	− 2567	−110.6	× 60 / 333	−19.9
Sum, rounded to a whole point						−71

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,562	2382.4	− 2432	−49.6	× 60 / 267	−11.1
4	79,564	2419.8	− 2473	−53.2	× 62 / 267	−12.4
5	79,566	2446.5	− 2502	−55.5	× 59 / 267	−12.3
7	79,568	2499.5	− 2552	−52.5	× 43 / 267	−8.5
8	79,570	2498.4	− 2567	−68.6	× 43 / 267	−11
Sum, rounded to a whole point						−55

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,078	2338.8	− 2432	−93.2	× 50 / 209	−22.3
4	80,079	2423.4	− 2473	−49.6	× 53 / 209	−12.6
5	80,080	2436.2	− 2502	−65.8	× 58 / 209	−18.3
8	80,081	2477.9	− 2567	−89.1	× 48 / 209	−20.5
Sum, rounded to a whole point						−74

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,356	2343.2	− 2432	−88.8	× 71 / 189	−33.4
4	80,357	2387.2	− 2473	−85.8	× 55 / 189	−25
5	80,358	2425.0	− 2502	−77	× 63 / 189	−25.7
Sum, rounded to a whole point						−84

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,320	2300.1	− 2432	−131.9	× 46 / 180	−33.7
4	80,321	2396.5	− 2473	−76.5	× 72 / 180	−30.6
5	80,322	2421.4	− 2502	−80.6	× 62 / 180	−27.8
Sum, rounded to a whole point						−92

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,338	2301.9	− 2432	−130.1	× 63 / 184	−44.5
4	80,339	2363.7	− 2473	−109.3	× 51 / 184	−30.3
5	80,340	2391.3	− 2502	−110.7	× 70 / 184	−42.1
Sum, rounded to a whole point						−117

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,002	2306.9	− 2432	−125.1	× 43 / 162	−33.2
4	80,003	2345.8	− 2473	−127.2	× 65 / 162	−51
5	80,004	2391.9	− 2502	−110.1	× 54 / 162	−36.7
Sum, rounded to a whole point						−121

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −93, −77, −71, −55, −74, −84, −92, −117, −121 → −87.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 16 · 2016→2017: 6 · 2017→2018: 16 · 2018→2019: 19 · 2019→2022: 10 · 2022→2023: 8 · 2023→2024: 25 · 2024→2025: 4 → average 13
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13 × 2.66 = 34.6. Upper limit −52.5, lower limit −121.7.

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.