Westside Union 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	44,309	2374.6	− 2432	−57.4	× 123 / 411	−17.2
4	44,312	2428.4	− 2473	−44.6	× 98 / 411	−10.6
5	44,313	2485.9	− 2502	−16.1	× 95 / 411	−3.7
6	44,315	2491.0	− 2531	−40	× 95 / 411	−9.2
Sum, rounded to a whole point						−41

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,010	2397.0	− 2432	−35	× 119 / 405	−10.3
4	41,012	2430.0	− 2473	−43	× 100 / 405	−10.6
5	41,014	2517.5	− 2502	15.5	× 92 / 405	3.5
6	41,016	2521.2	− 2531	−9.8	× 94 / 405	−2.3
Sum, rounded to a whole point						−20

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	42,018	2394.4	− 2432	−37.6	× 85 / 393	−8.1
4	42,020	2460.2	− 2473	−12.8	× 117 / 393	−3.8
5	42,023	2510.6	− 2502	8.6	× 98 / 393	2.1
6	42,025	2528.2	− 2531	−2.8	× 93 / 393	−0.7
Sum, rounded to a whole point						−10

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	42,040	2389.9	− 2432	−42.1	× 88 / 366	−10.1
4	42,041	2464.5	− 2473	−8.5	× 77 / 366	−1.8
5	42,044	2526.7	− 2502	24.7	× 101 / 366	6.8
6	42,045	2504.6	− 2531	−26.4	× 100 / 366	−7.2
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	42,177	2424.9	− 2432	−7.1	× 86 / 356	−1.7
4	42,178	2455.3	− 2473	−17.7	× 88 / 356	−4.4
5	42,179	2533.7	− 2502	31.7	× 85 / 356	7.6
6	42,180	2555.8	− 2531	24.8	× 97 / 356	6.8
Sum, rounded to a whole point						8

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,946	2427.9	− 2432	−4.1	× 81 / 344	−1
4	41,947	2449.7	− 2473	−23.3	× 79 / 344	−5.4
5	41,948	2554.6	− 2502	52.6	× 90 / 344	13.8
6	41,949	2535.5	− 2531	4.5	× 94 / 344	1.2
Sum, rounded to a whole point						9

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,971	2385.2	− 2432	−46.8	× 96 / 366	−12.3
4	41,972	2458.9	− 2473	−14.1	× 83 / 366	−3.2
5	41,973	2511.4	− 2502	9.4	× 90 / 366	2.3
6	41,974	2540.4	− 2531	9.4	× 97 / 366	2.5
Sum, rounded to a whole point						−11

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,802	2391.6	− 2432	−40.4	× 85 / 340	−10.1
4	41,803	2439.5	− 2473	−33.5	× 83 / 340	−8.2
5	41,804	2529.0	− 2502	27	× 83 / 340	6.6
6	41,805	2529.8	− 2531	−1.2	× 89 / 340	−0.3
Sum, rounded to a whole point						−12

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,561	2376.1	− 2432	−55.9	× 91 / 360	−14.1
4	41,562	2454.6	− 2473	−18.4	× 88 / 360	−4.5
5	41,563	2468.0	− 2502	−34	× 98 / 360	−9.3
6	41,564	2563.3	− 2531	32.3	× 83 / 360	7.4
Sum, rounded to a whole point						−20

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −41, −20, −10, −12, 8, 9, −11, −12, −20 → −12.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 21 · 2016→2017: 10 · 2017→2018: 2 · 2018→2019: 20 · 2019→2022: 1 · 2022→2023: 20 · 2023→2024: 1 · 2024→2025: 8 → 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 15.6, lower limit −39.8.

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.