Lillian Street 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	30,977	2364.7	− 2432	−67.3	× 93 / 327	−19.1
4	30,979	2408.0	− 2473	−65	× 70 / 327	−13.9
5	30,981	2454.6	− 2502	−47.4	× 83 / 327	−12
6	30,983	2470.6	− 2531	−60.4	× 81 / 327	−15
Sum, rounded to a whole point						−60

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	29,195	2380.1	− 2432	−51.9	× 76 / 296	−13.3
4	29,198	2426.2	− 2473	−46.8	× 91 / 296	−14.4
5	29,200	2459.7	− 2502	−42.3	× 68 / 296	−9.7
6	29,201	2522.6	− 2531	−8.4	× 61 / 296	−1.7
Sum, rounded to a whole point						−39

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	29,760	2378.2	− 2432	−53.8	× 69 / 289	−12.8
4	29,762	2423.4	− 2473	−49.6	× 73 / 289	−12.5
5	29,765	2464.6	− 2502	−37.4	× 88 / 289	−11.4
6	29,767	2487.3	− 2531	−43.7	× 59 / 289	−8.9
Sum, rounded to a whole point						−46

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	29,810	2409.6	− 2432	−22.4	× 57 / 265	−4.8
4	29,812	2443.2	− 2473	−29.8	× 67 / 265	−7.5
5	29,814	2459.9	− 2502	−42.1	× 67 / 265	−10.6
6	29,816	2490.3	− 2531	−40.7	× 74 / 265	−11.4
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	29,981	2407.8	− 2432	−24.2	× 71 / 261	−6.6
4	29,982	2460.5	− 2473	−12.5	× 60 / 261	−2.9
5	29,983	2493.7	− 2502	−8.3	× 68 / 261	−2.2
6	29,984	2502.2	− 2531	−28.8	× 62 / 261	−6.8
Sum, rounded to a whole point						−18

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	30,014	2392.7	− 2432	−39.3	× 39 / 208	−7.4
4	30,015	2401.5	− 2473	−71.5	× 63 / 208	−21.7
5	30,016	2486.1	− 2502	−15.9	× 45 / 208	−3.4
6	30,017	2496.0	− 2531	−35	× 61 / 208	−10.3
Sum, rounded to a whole point						−43

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	30,071	2358.7	− 2432	−73.3	× 39 / 182	−15.7
4	30,072	2442.3	− 2473	−30.7	× 40 / 182	−6.7
5	30,073	2430.3	− 2502	−71.7	× 66 / 182	−26
6	30,074	2492.6	− 2531	−38.4	× 37 / 182	−7.8
Sum, rounded to a whole point						−56

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	29,937	2396.7	− 2432	−35.3	× 40 / 170	−8.3
4	29,938	2423.6	− 2473	−49.4	× 37 / 170	−10.8
5	29,939	2463.1	− 2502	−38.9	× 40 / 170	−9.2
6	29,940	2485.2	− 2531	−45.8	× 53 / 170	−14.3
Sum, rounded to a whole point						−42

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	29,798	2387.7	− 2432	−44.3	× 39 / 150	−11.5
4	29,799	2415.4	− 2473	−57.6	× 42 / 150	−16.1
5	29,800	2461.4	− 2502	−40.6	× 38 / 150	−10.3
6	29,801	2503.4	− 2531	−27.6	× 31 / 150	−5.7
Sum, rounded to a whole point						−44

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −60, −39, −46, −34, −18, −43, −56, −42, −44 → −42.4
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: 7 · 2017→2018: 12 · 2018→2019: 16 · 2019→2022: 25 · 2022→2023: 13 · 2023→2024: 14 · 2024→2025: 2 → average 13.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13.8 × 2.66 = 36.7. Upper limit −5.7, lower limit −79.1.

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.