Shasta 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	79,896	2369.5	− 2432	−62.5	× 93 / 486	−12
4	79,899	2405.9	− 2473	−67.1	× 83 / 486	−11.5
5	79,900	2474.7	− 2502	−27.3	× 75 / 486	−4.2
6	79,903	2489.6	− 2531	−41.4	× 67 / 486	−5.7
7	79,904	2495.3	− 2552	−56.7	× 87 / 486	−10.2
8	79,907	2536.1	− 2567	−30.9	× 81 / 486	−5.2
Sum, rounded to a whole point						−49

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	74,026	2403.3	− 2432	−28.7	× 109 / 521	−6
4	74,029	2430.6	− 2473	−42.4	× 91 / 521	−7.4
5	74,030	2469.8	− 2502	−32.2	× 77 / 521	−4.8
6	74,032	2519.3	− 2531	−11.7	× 81 / 521	−1.8
7	74,035	2505.7	− 2552	−46.3	× 72 / 521	−6.4
8	74,036	2503.5	− 2567	−63.5	× 91 / 521	−11.1
Sum, rounded to a whole point						−37

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,013	2402.4	− 2432	−29.6	× 87 / 517	−5
4	76,016	2434.4	− 2473	−38.6	× 105 / 517	−7.8
5	76,017	2471.8	− 2502	−30.2	× 87 / 517	−5.1
6	76,020	2513.8	− 2531	−17.2	× 77 / 517	−2.6
7	76,022	2520.6	− 2552	−31.4	× 87 / 517	−5.3
8	76,024	2511.8	− 2567	−55.2	× 74 / 517	−7.9
Sum, rounded to a whole point						−34

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,205	2401.3	− 2432	−30.7	× 79 / 521	−4.7
4	76,207	2452.1	− 2473	−20.9	× 84 / 521	−3.4
5	76,209	2492.9	− 2502	−9.1	× 99 / 521	−1.7
6	76,211	2528.8	− 2531	−2.2	× 87 / 521	−0.4
7	76,213	2516.2	− 2552	−35.8	× 89 / 521	−6.1
8	76,215	2565.6	− 2567	−1.4	× 83 / 521	−0.2
Sum, rounded to a whole point						−16

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,722	2420.4	− 2432	−11.6	× 88 / 526	−1.9
4	76,723	2441.2	− 2473	−31.8	× 86 / 526	−5.2
5	76,724	2514.0	− 2502	12	× 78 / 526	1.8
6	76,725	2523.6	− 2531	−7.4	× 101 / 526	−1.4
7	76,726	2562.4	− 2552	10.4	× 87 / 526	1.7
8	76,727	2558.1	− 2567	−8.9	× 86 / 526	−1.5
Sum, rounded to a whole point						−7

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,878	2342.1	− 2432	−89.9	× 75 / 517	−13
4	76,879	2427.7	− 2473	−45.3	× 68 / 517	−6
5	76,880	2471.5	− 2502	−30.5	× 92 / 517	−5.4
6	76,881	2503.8	− 2531	−27.2	× 92 / 517	−4.8
7	76,882	2515.6	− 2552	−36.4	× 94 / 517	−6.6
8	76,883	2548.0	− 2567	−19	× 96 / 517	−3.5
Sum, rounded to a whole point						−39

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,872	2353.2	− 2432	−78.8	× 82 / 516	−12.5
4	76,873	2381.2	− 2473	−91.8	× 78 / 516	−13.9
5	76,874	2490.0	− 2502	−12	× 71 / 516	−1.7
6	76,875	2482.0	− 2531	−49	× 99 / 516	−9.4
7	76,876	2518.0	− 2552	−34	× 93 / 516	−6.1
8	76,877	2538.4	− 2567	−28.6	× 93 / 516	−5.2
Sum, rounded to a whole point						−49

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,863	2373.1	− 2432	−58.9	× 89 / 534	−9.8
4	76,864	2377.7	− 2473	−95.3	× 83 / 534	−14.8
5	76,865	2452.3	− 2502	−49.7	× 83 / 534	−7.7
6	76,866	2476.7	− 2531	−54.3	× 91 / 534	−9.3
7	76,867	2522.4	− 2552	−29.6	× 94 / 534	−5.2
8	76,868	2543.4	− 2567	−23.6	× 94 / 534	−4.2
Sum, rounded to a whole point						−51

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,516	2323.4	− 2432	−108.6	× 92 / 501	−19.9
4	76,517	2405.5	− 2473	−67.5	× 78 / 501	−10.5
5	76,518	2465.1	− 2502	−36.9	× 79 / 501	−5.8
6	76,519	2472.3	− 2531	−58.7	× 79 / 501	−9.3
7	76,520	2528.0	− 2552	−24	× 74 / 501	−3.5
8	76,521	2538.0	− 2567	−29	× 99 / 501	−5.7
Sum, rounded to a whole point						−55

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −49, −37, −34, −16, −7, −39, −49, −51, −55 → −37.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 12 · 2016→2017: 3 · 2017→2018: 18 · 2018→2019: 9 · 2019→2022: 32 · 2022→2023: 10 · 2023→2024: 2 · 2024→2025: 4 → average 11.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.3 × 2.66 = 30.1. Upper limit −7.3, lower limit −67.5.

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.