Edith B. Storey 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	11,180	2404.4	− 2432	−27.6	× 142 / 521	−7.5
4	11,182	2422.6	− 2473	−50.4	× 135 / 521	−13.1
5	11,184	2467.8	− 2502	−34.2	× 125 / 521	−8.2
6	11,186	2488.7	− 2531	−42.3	× 119 / 521	−9.7
Sum, rounded to a whole point						−38

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,198	2415.7	− 2432	−16.3	× 125 / 522	−3.9
4	10,200	2428.2	− 2473	−44.8	× 145 / 522	−12.4
5	10,202	2470.1	− 2502	−31.9	× 134 / 522	−8.2
6	10,204	2493.0	− 2531	−38	× 118 / 522	−8.6
Sum, rounded to a whole point						−33

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,526	2437.4	− 2432	5.4	× 134 / 528	1.4
4	10,529	2439.1	− 2473	−33.9	× 127 / 528	−8.2
5	10,530	2454.4	− 2502	−47.6	× 142 / 528	−12.8
6	10,533	2490.8	− 2531	−40.2	× 125 / 528	−9.5
Sum, rounded to a whole point						−29

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,538	2461.3	− 2432	29.3	× 120 / 516	6.8
4	10,540	2467.3	− 2473	−5.7	× 135 / 516	−1.5
5	10,542	2468.1	− 2502	−33.9	× 122 / 516	−8
6	10,544	2513.8	− 2531	−17.2	× 139 / 516	−4.6
Sum, rounded to a whole point						−7

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,614	2461.7	− 2432	29.7	× 136 / 518	7.8
4	10,615	2461.4	− 2473	−11.6	× 122 / 518	−2.7
5	10,616	2484.6	− 2502	−17.4	× 139 / 518	−4.7
6	10,617	2536.0	− 2531	5	× 121 / 518	1.2
Sum, rounded to a whole point						2

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,607	2435.0	− 2432	3	× 110 / 470	0.7
4	10,608	2423.8	− 2473	−49.2	× 120 / 470	−12.6
5	10,609	2515.7	− 2502	13.7	× 122 / 470	3.6
6	10,610	2527.0	− 2531	−4	× 118 / 470	−1
Sum, rounded to a whole point						−9

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,595	2460.5	− 2432	28.5	× 61 / 301	5.8
4	10,596	2444.3	− 2473	−28.7	× 67 / 301	−6.4
5	10,597	2498.0	− 2502	−4	× 78 / 301	−1
6	10,598	2545.0	− 2531	14	× 95 / 301	4.4
Sum, rounded to a whole point						3

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,561	2467.7	− 2432	35.7	× 70 / 298	8.4
4	10,562	2463.5	− 2473	−9.5	× 69 / 298	−2.2
5	10,563	2495.5	− 2502	−6.5	× 72 / 298	−1.6
6	10,564	2535.4	− 2531	4.4	× 87 / 298	1.3
Sum, rounded to a whole point						6

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,538	2470.6	− 2432	38.6	× 61 / 267	8.8
4	10,539	2475.7	− 2473	2.7	× 70 / 267	0.7
5	10,540	2507.2	− 2502	5.2	× 67 / 267	1.3
6	10,541	2534.7	− 2531	3.7	× 69 / 267	1
Sum, rounded to a whole point						12

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −38, −33, −29, −7, 2, −9, 3, 6, 12 → −10.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 5 · 2016→2017: 4 · 2017→2018: 22 · 2018→2019: 9 · 2019→2022: 11 · 2022→2023: 12 · 2023→2024: 3 · 2024→2025: 6 → average 9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9 × 2.66 = 23.9. Upper limit 13.6, lower limit −34.2.

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.