Edison (Thomas) 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	48,008	2359.6	− 2432	−72.4	× 121 / 511	−17.1
4	48,011	2403.0	− 2473	−70	× 131 / 511	−17.9
5	48,012	2449.6	− 2502	−52.4	× 125 / 511	−12.8
6	48,015	2473.1	− 2531	−57.9	× 134 / 511	−15.2
Sum, rounded to a whole point						−63

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,676	2357.4	− 2432	−74.6	× 136 / 500	−20.3
4	44,678	2400.9	− 2473	−72.1	× 117 / 500	−16.9
5	44,679	2441.9	− 2502	−60.1	× 125 / 500	−15
6	44,681	2471.3	− 2531	−59.7	× 122 / 500	−14.6
Sum, rounded to a whole point						−67

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,847	2349.9	− 2432	−82.1	× 106 / 502	−17.3
4	45,848	2385.1	− 2473	−87.9	× 146 / 502	−25.6
5	45,851	2433.7	− 2502	−68.3	× 119 / 502	−16.2
6	45,853	2455.1	− 2531	−75.9	× 131 / 502	−19.8
Sum, rounded to a whole point						−79

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,864	2388.3	− 2432	−43.7	× 125 / 482	−11.3
4	45,865	2428.6	− 2473	−44.4	× 105 / 482	−9.7
5	45,868	2445.5	− 2502	−56.5	× 138 / 482	−16.2
6	45,869	2471.8	− 2531	−59.2	× 114 / 482	−14
Sum, rounded to a whole point						−51

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,040	2370.1	− 2432	−61.9	× 127 / 485	−16.2
4	46,041	2433.9	− 2473	−39.1	× 127 / 485	−10.2
5	46,042	2474.0	− 2502	−28	× 98 / 485	−5.7
6	46,043	2468.4	− 2531	−62.6	× 133 / 485	−17.2
Sum, rounded to a whole point						−49

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,858	2386.7	− 2432	−45.3	× 108 / 464	−10.5
4	45,859	2426.7	− 2473	−46.3	× 105 / 464	−10.5
5	45,860	2450.6	− 2502	−51.4	× 129 / 464	−14.3
6	45,861	2448.8	− 2531	−82.2	× 122 / 464	−21.6
Sum, rounded to a whole point						−57

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,840	2373.3	− 2432	−58.7	× 101 / 444	−13.4
4	45,841	2423.6	− 2473	−49.4	× 105 / 444	−11.7
5	45,842	2443.5	− 2502	−58.5	× 106 / 444	−14
6	45,843	2455.2	− 2531	−75.8	× 132 / 444	−22.5
Sum, rounded to a whole point						−62

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,699	2377.4	− 2432	−54.6	× 98 / 405	−13.2
4	45,700	2426.8	− 2473	−46.2	× 97 / 405	−11.1
5	45,701	2432.0	− 2502	−70	× 107 / 405	−18.5
6	45,702	2455.3	− 2531	−75.7	× 103 / 405	−19.3
Sum, rounded to a whole point						−62

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,453	2410.5	− 2432	−21.5	× 79 / 380	−4.5
4	45,454	2416.3	− 2473	−56.7	× 95 / 380	−14.2
5	45,455	2445.0	− 2502	−57	× 98 / 380	−14.7
6	45,456	2461.5	− 2531	−69.5	× 108 / 380	−19.8
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. −63, −67, −79, −51, −49, −57, −62, −62, −53 → −60.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 4 · 2016→2017: 12 · 2017→2018: 28 · 2018→2019: 2 · 2019→2022: 8 · 2022→2023: 5 · 2023→2024: 0 · 2024→2025: 9 → average 8.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.5 × 2.66 = 22.6. Upper limit −37.7, lower limit −82.9.

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.