Edison Elementary: math

The shaded band is this district'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	16,758	2386.6	− 2436	−49.4	× 123 / 700	−8.7
4	16,759	2408.0	− 2485	−77	× 115 / 700	−12.7
5	16,762	2446.3	− 2528	−81.7	× 115 / 700	−13.4
6	16,763	2487.0	− 2552	−65	× 115 / 700	−10.7
7	16,766	2475.8	− 2567	−91.2	× 118 / 700	−15.4
8	16,768	2516.5	− 2586	−69.5	× 114 / 700	−11.3
Sum, rounded to a whole point						−72

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	15,774	2404.7	− 2436	−31.3	× 112 / 706	−5
4	15,777	2415.0	− 2485	−70	× 126 / 706	−12.5
5	15,778	2455.8	− 2528	−72.2	× 107 / 706	−10.9
6	15,781	2479.2	− 2552	−72.8	× 114 / 706	−11.8
7	15,783	2501.6	− 2567	−65.4	× 120 / 706	−11.1
8	15,784	2493.4	− 2586	−92.6	× 127 / 706	−16.7
Sum, rounded to a whole point						−68

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,096	2408.5	− 2436	−27.5	× 113 / 688	−4.5
4	16,097	2416.8	− 2485	−68.2	× 113 / 688	−11.2
5	16,099	2447.6	− 2528	−80.4	× 116 / 688	−13.6
6	16,102	2496.6	− 2552	−55.4	× 118 / 688	−9.5
7	16,104	2471.2	− 2567	−95.8	× 110 / 688	−15.3
8	16,106	2527.2	− 2586	−58.8	× 118 / 688	−10.1
Sum, rounded to a whole point						−64

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,112	2435.3	− 2436	−0.7	× 98 / 695	−0.1
4	16,114	2431.6	− 2485	−53.4	× 116 / 695	−8.9
5	16,116	2447.0	− 2528	−81	× 106 / 695	−12.4
6	16,118	2496.5	− 2552	−55.5	× 127 / 695	−10.1
7	16,120	2473.9	− 2567	−93.1	× 133 / 695	−17.8
8	16,122	2468.5	− 2586	−117.5	× 115 / 695	−19.4
Sum, rounded to a whole point						−69

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,247	2448.8	− 2436	12.8	× 108 / 672	2.1
4	16,248	2441.8	− 2485	−43.2	× 101 / 672	−6.5
5	16,249	2457.2	− 2528	−70.8	× 114 / 672	−12
6	16,250	2476.5	− 2552	−75.5	× 106 / 672	−11.9
7	16,251	2496.9	− 2567	−70.1	× 119 / 672	−12.4
8	16,252	2464.4	− 2586	−121.6	× 124 / 672	−22.4
Sum, rounded to a whole point						−63

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,289	2410.8	− 2436	−25.2	× 116 / 687	−4.3
4	16,290	2406.2	− 2485	−78.8	× 125 / 687	−14.3
5	16,291	2403.4	− 2528	−124.6	× 119 / 687	−21.6
6	16,292	2461.9	− 2552	−90.1	× 110 / 687	−14.4
7	16,293	2465.5	− 2567	−101.5	× 100 / 687	−14.8
8	16,294	2470.3	− 2586	−115.7	× 117 / 687	−19.7
Sum, rounded to a whole point						−89

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,227	2414.3	− 2436	−21.7	× 124 / 670	−4
4	16,228	2429.3	− 2485	−55.7	× 114 / 670	−9.5
5	16,229	2428.4	− 2528	−99.6	× 116 / 670	−17.2
6	16,230	2424.6	− 2552	−127.4	× 115 / 670	−21.9
7	16,231	2471.8	− 2567	−95.2	× 108 / 670	−15.3
8	16,232	2456.5	− 2586	−129.5	× 93 / 670	−18
Sum, rounded to a whole point						−86

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,172	2430.7	− 2436	−5.3	× 119 / 712	−0.9
4	16,173	2417.8	− 2485	−67.2	× 132 / 712	−12.5
5	16,174	2430.9	− 2528	−97.1	× 106 / 712	−14.5
6	16,175	2459.2	− 2552	−92.8	× 122 / 712	−15.9
7	16,176	2430.9	− 2567	−136.1	× 123 / 712	−23.5
8	16,177	2476.1	− 2586	−109.9	× 110 / 712	−17
Sum, rounded to a whole point						−84

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,159	2406.6	− 2436	−29.4	× 129 / 703	−5.4
4	16,160	2435.6	− 2485	−49.4	× 104 / 703	−7.3
5	16,161	2446.8	− 2528	−81.2	× 124 / 703	−14.3
6	16,162	2443.8	− 2552	−108.2	× 104 / 703	−16
7	16,163	2466.8	− 2567	−100.2	× 121 / 703	−17.2
8	16,164	2449.1	− 2586	−136.9	× 121 / 703	−23.6
Sum, rounded to a whole point						−84

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,174	2452.5	− 2436	16.5	× 97 / 697	2.3
4	16,175	2420.9	− 2485	−64.1	× 136 / 697	−12.5
5	16,176	2442.2	− 2528	−85.8	× 98 / 697	−12.1
6	16,177	2465.7	− 2552	−86.3	× 125 / 697	−15.5
7	16,178	2461.7	− 2567	−105.3	× 112 / 697	−16.9
8	16,179	2469.4	− 2586	−116.6	× 129 / 697	−21.6
Sum, rounded to a whole point						−76

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −72, −68, −64, −69, −63, −89, −86, −84, −84, −76 → −75.5
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: 4 · 2017→2018: 5 · 2018→2019: 6 · 2019→2022: 26 · 2022→2023: 3 · 2023→2024: 2 · 2024→2025: 0 · 2025→2026: 8 → average 6.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.4 × 2.66 = 17. Upper limit −58.5, lower limit −92.5.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

Edison Elementary