Steffan Manor 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	93,646	2352.4	− 2432	−79.6	× 102 / 311	−26.1
4	93,649	2392.8	− 2473	−80.2	× 97 / 311	−25
5	93,650	2441.5	− 2502	−60.5	× 112 / 311	−21.8
Sum, rounded to a whole point						−73

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,023	2378.9	− 2432	−53.1	× 110 / 308	−19
4	87,026	2402.4	− 2473	−70.6	× 100 / 308	−22.9
5	87,028	2437.8	− 2502	−64.2	× 98 / 308	−20.4
Sum, rounded to a whole point						−62

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,486	2370.6	− 2432	−61.4	× 96 / 304	−19.4
4	89,489	2380.0	− 2473	−93	× 113 / 304	−34.6
5	89,491	2403.6	− 2502	−98.4	× 95 / 304	−30.8
Sum, rounded to a whole point						−85

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,698	2414.3	− 2432	−17.7	× 99 / 317	−5.5
4	89,699	2386.9	− 2473	−86.1	× 94 / 317	−25.5
5	89,702	2424.4	− 2502	−77.6	× 124 / 317	−30.4
Sum, rounded to a whole point						−61

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,317	2387.5	− 2432	−44.5	× 99 / 291	−15.1
4	90,318	2415.0	− 2473	−58	× 100 / 291	−19.9
5	90,319	2438.4	− 2502	−63.6	× 92 / 291	−20.1
Sum, rounded to a whole point						−55

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,581	2354.6	− 2432	−77.4	× 71 / 207	−26.5
4	90,582	2414.1	− 2473	−58.9	× 56 / 207	−15.9
5	90,583	2403.1	− 2502	−98.9	× 80 / 207	−38.2
Sum, rounded to a whole point						−81

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,481	2376.8	− 2432	−55.2	× 76 / 205	−20.5
4	90,482	2379.9	− 2473	−93.1	× 64 / 205	−29.1
5	90,483	2406.9	− 2502	−95.1	× 65 / 205	−30.2
Sum, rounded to a whole point						−80

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,412	2353.8	− 2432	−78.2	× 59 / 184	−25.1
4	90,413	2413.7	− 2473	−59.3	× 66 / 184	−21.3
5	90,414	2391.7	− 2502	−110.3	× 59 / 184	−35.4
Sum, rounded to a whole point						−82

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,094	2388.9	− 2432	−43.1	× 72 / 204	−15.2
4	90,095	2408.3	− 2473	−64.7	× 62 / 204	−19.7
5	90,096	2448.7	− 2502	−53.3	× 70 / 204	−18.3
Sum, rounded to a whole point						−53

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −73, −62, −85, −61, −55, −81, −80, −82, −53 → −70.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 11 · 2016→2017: 23 · 2017→2018: 24 · 2018→2019: 6 · 2019→2022: 26 · 2022→2023: 1 · 2023→2024: 2 · 2024→2025: 29 → average 15.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 15.3 × 2.66 = 40.7. Upper limit −29.5, lower limit −110.9.

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.