Gidley 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	23,252	2390.1	− 2432	−41.9	× 35 / 409	−3.6
4	23,254	2427.0	− 2473	−46	× 22 / 409	−2.5
5	23,256	2495.4	− 2502	−6.6	× 30 / 409	−0.5
6	23,258	2529.0	− 2531	−2	× 30 / 409	−0.1
7	23,260	2554.3	− 2552	2.3	× 138 / 409	0.8
8	23,262	2574.5	− 2567	7.5	× 154 / 409	2.8
Sum, rounded to a whole point						−3

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,843	2399.6	− 2432	−32.4	× 16 / 394	−1.3
4	21,846	2461.3	− 2473	−11.7	× 34 / 394	−1
5	21,848	2466.1	− 2502	−35.9	× 24 / 394	−2.2
6	21,849	2547.2	− 2531	16.2	× 31 / 394	1.3
7	21,851	2559.1	− 2552	7.1	× 148 / 394	2.7
8	21,854	2595.9	− 2567	28.9	× 141 / 394	10.3
Sum, rounded to a whole point						10

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,261	2383.9	− 2432	−48.1	× 25 / 387	−3.1
4	22,263	2470.9	− 2473	−2.1	× 14 / 387	−0.1
5	22,264	2494.3	− 2502	−7.7	× 34 / 387	−0.7
6	22,266	2521.8	− 2531	−9.2	× 29 / 387	−0.7
7	22,268	2549.8	− 2552	−2.2	× 144 / 387	−0.8
8	22,270	2590.0	− 2567	23	× 141 / 387	8.4
Sum, rounded to a whole point						3

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,247	2410.6	− 2432	−21.4	× 17 / 378	−1
4	22,249	2449.0	− 2473	−24	× 26 / 378	−1.7
5	22,251	2525.3	− 2502	23.3	× 15 / 378	0.9
6	22,253	2567.5	− 2531	36.5	× 33 / 378	3.2
7	22,255	2555.1	− 2552	3.1	× 147 / 378	1.2
8	22,257	2576.0	− 2567	9	× 140 / 378	3.3
Sum, rounded to a whole point						6

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,421	2402.7	− 2432	−29.3	× 23 / 368	−1.8
4	22,422	2487.4	− 2473	14.4	× 15 / 368	0.6
5	22,423	2482.5	− 2502	−19.5	× 26 / 368	−1.4
6	22,424	2593.6	− 2531	62.6	× 18 / 368	3.1
7	22,425	2587.6	− 2552	35.6	× 140 / 368	13.5
8	22,426	2585.1	− 2567	18.1	× 146 / 368	7.2
Sum, rounded to a whole point						21

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,388	2398.9	− 2432	−33.1	× 26 / 340	−2.5
4	22,389	2479.0	− 2473	6	× 30 / 340	0.5
5	22,390	2506.4	− 2502	4.4	× 17 / 340	0.2
6	22,391	2598.5	− 2531	67.5	× 24 / 340	4.8
7	22,392	2577.3	− 2552	25.3	× 117 / 340	8.7
8	22,393	2582.9	− 2567	15.9	× 126 / 340	5.9
Sum, rounded to a whole point						18

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,363	2374.3	− 2432	−57.7	× 21 / 341	−3.6
4	22,364	2476.5	− 2473	3.5	× 24 / 341	0.2
5	22,365	2531.3	− 2502	29.3	× 29 / 341	2.5
6	22,366	2543.5	− 2531	12.5	× 18 / 341	0.7
7	22,367	2561.9	− 2552	9.9	× 138 / 341	4
8	22,368	2590.8	− 2567	23.8	× 111 / 341	7.7
Sum, rounded to a whole point						12

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,213	2411.8	− 2432	−20.2	× 17 / 347	−1
4	22,214	2452.5	− 2473	−20.5	× 19 / 347	−1.1
5	22,215	2512.1	− 2502	10.1	× 24 / 347	0.7
6	22,216	2577.8	− 2531	46.8	× 30 / 347	4
7	22,217	2574.5	− 2552	22.5	× 126 / 347	8.2
8	22,218	2552.7	− 2567	−14.3	× 131 / 347	−5.4
Sum, rounded to a whole point						5

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,124	2401.5	− 2432	−30.5	× 15 / 347	−1.3
4	22,125	2459.0	− 2473	−14	× 23 / 347	−0.9
5	22,126	2498.0	− 2502	−4	× 19 / 347	−0.2
6	22,127	2546.2	− 2531	15.2	× 25 / 347	1.1
7	22,128	2569.6	− 2552	17.6	× 140 / 347	7.1
8	22,129	2564.0	− 2567	−3	× 125 / 347	−1.1
Sum, rounded to a whole point						5

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −3, 10, 3, 6, 21, 18, 12, 5, 5 → 8.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 13 · 2016→2017: 7 · 2017→2018: 3 · 2018→2019: 15 · 2019→2022: 3 · 2022→2023: 6 · 2023→2024: 7 · 2024→2025: 0 → average 6.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.8 × 2.66 = 18.1. Upper limit 26.7, lower limit −9.5.

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. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.