Reagan 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	100,694	2340.9	− 2432	−91.1	× 43 / 252	−15.5
4	100,695	2359.8	− 2473	−113.2	× 27 / 252	−12.1
5	100,698	2418.4	− 2502	−83.6	× 38 / 252	−12.6
6	100,699	2423.9	− 2531	−107.1	× 54 / 252	−23
7	100,702	2462.7	− 2552	−89.3	× 43 / 252	−15.2
8	100,703	2467.4	− 2567	−99.6	× 47 / 252	−18.6
Sum, rounded to a whole point						−97

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,403	2333.2	− 2432	−98.8	× 49 / 260	−18.6
4	93,405	2373.5	− 2473	−99.5	× 42 / 260	−16.1
5	93,407	2413.6	− 2502	−88.4	× 30 / 260	−10.2
6	93,408	2401.0	− 2531	−130	× 39 / 260	−19.5
7	93,411	2477.6	− 2552	−74.4	× 49 / 260	−14
8	93,412	2481.4	− 2567	−85.6	× 51 / 260	−16.8
Sum, rounded to a whole point						−95

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,165	2305.0	− 2432	−127	× 44 / 268	−20.9
4	96,166	2359.8	− 2473	−113.2	× 52 / 268	−22
5	96,169	2390.3	− 2502	−111.7	× 49 / 268	−20.4
6	96,170	2383.9	− 2531	−147.1	× 34 / 268	−18.7
7	96,173	2474.1	− 2552	−77.9	× 41 / 268	−11.9
8	96,174	2478.4	− 2567	−88.6	× 48 / 268	−15.9
Sum, rounded to a whole point						−110

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,353	2397.0	− 2432	−35	× 42 / 250	−5.9
4	96,354	2440.8	− 2473	−32.2	× 45 / 250	−5.8
5	96,357	2467.7	− 2502	−34.3	× 48 / 250	−6.6
6	96,358	2491.2	− 2531	−39.8	× 42 / 250	−6.7
7	96,361	2505.9	− 2552	−46.1	× 32 / 250	−5.9
8	96,362	2550.1	− 2567	−16.9	× 41 / 250	−2.8
Sum, rounded to a whole point						−34

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	97,015	2427.3	− 2432	−4.7	× 38 / 238	−0.8
4	97,016	2444.9	− 2473	−28.1	× 41 / 238	−4.8
5	97,017	2501.2	− 2502	−0.8	× 41 / 238	−0.1
6	97,018	2516.3	− 2531	−14.7	× 49 / 238	−3
7	97,019	2591.9	− 2552	39.9	× 41 / 238	6.9
8	97,020	2549.3	− 2567	−17.7	× 28 / 238	−2.1
Sum, rounded to a whole point						−4

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	97,201	2360.9	− 2432	−71.1	× 47 / 250	−13.4
4	97,202	2415.6	− 2473	−57.4	× 44 / 250	−10.1
5	97,203	2478.5	− 2502	−23.5	× 41 / 250	−3.9
6	97,204	2514.3	− 2531	−16.7	× 33 / 250	−2.2
7	97,205	2574.0	− 2552	22	× 42 / 250	3.7
8	97,206	2551.9	− 2567	−15.1	× 43 / 250	−2.6
Sum, rounded to a whole point						−28

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	97,052	2404.6	− 2432	−27.4	× 37 / 254	−4
4	97,053	2418.1	− 2473	−54.9	× 48 / 254	−10.4
5	97,054	2453.9	− 2502	−48.1	× 45 / 254	−8.5
6	97,055	2520.4	− 2531	−10.6	× 43 / 254	−1.8
7	97,056	2568.9	− 2552	16.9	× 39 / 254	2.6
8	97,057	2565.5	− 2567	−1.5	× 42 / 254	−0.2
Sum, rounded to a whole point						−22

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,939	2369.8	− 2432	−62.2	× 39 / 256	−9.5
4	96,940	2428.6	− 2473	−44.4	× 45 / 256	−7.8
5	96,941	2452.6	− 2502	−49.4	× 50 / 256	−9.6
6	96,942	2460.8	− 2531	−70.2	× 48 / 256	−13.2
7	96,943	2570.1	− 2552	18.1	× 39 / 256	2.8
8	96,944	2545.8	− 2567	−21.2	× 35 / 256	−2.9
Sum, rounded to a whole point						−40

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,656	2410.9	− 2432	−21.1	× 37 / 263	−3
4	96,657	2433.8	− 2473	−39.2	× 37 / 263	−5.5
5	96,658	2484.6	− 2502	−17.4	× 46 / 263	−3
6	96,659	2475.5	− 2531	−55.5	× 54 / 263	−11.4
7	96,660	2532.2	− 2552	−19.8	× 50 / 263	−3.8
8	96,661	2545.6	− 2567	−21.4	× 39 / 263	−3.2
Sum, rounded to a whole point						−30

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −97, −95, −110, −34, −4, −28, −22, −40, −30 → −51.1
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: 15 · 2017→2018: 76 · 2018→2019: 30 · 2019→2022: 24 · 2022→2023: 6 · 2023→2024: 18 · 2024→2025: 10 → average 22.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 22.6 × 2.66 = 60.1. Upper limit 9, lower limit −111.2.

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.