Sierra Vista K-8: 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.

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,158	2403.8	− 2432	−28.2	× 48 / 283	−4.8
4	89,160	2462.8	− 2473	−10.2	× 61 / 283	−2.2
5	89,163	2508.3	− 2502	6.3	× 53 / 283	1.2
6	89,164	2506.8	− 2531	−24.2	× 52 / 283	−4.4
7	89,167	2534.2	− 2552	−17.8	× 69 / 283	−4.3
Sum, rounded to a whole point						−15

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,362	2438.2	− 2432	6.2	× 46 / 394	0.7
4	89,365	2456.1	− 2473	−16.9	× 58 / 394	−2.5
5	89,366	2481.5	− 2502	−20.5	× 58 / 394	−3
6	89,369	2525.7	− 2531	−5.3	× 61 / 394	−0.8
7	89,370	2565.3	− 2552	13.3	× 93 / 394	3.1
8	89,373	2553.4	− 2567	−13.6	× 78 / 394	−2.7
Sum, rounded to a whole point						−5

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,969	2422.2	− 2432	−9.8	× 46 / 427	−1.1
4	89,970	2483.2	− 2473	10.2	× 63 / 427	1.5
5	89,971	2488.0	− 2502	−14	× 61 / 427	−2
6	89,972	2528.9	− 2531	−2.1	× 61 / 427	−0.3
7	89,973	2576.8	− 2552	24.8	× 101 / 427	5.9
8	89,974	2575.1	− 2567	8.1	× 95 / 427	1.8
Sum, rounded to a whole point						6

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,241	2434.3	− 2432	2.3	× 48 / 431	0.3
4	90,242	2507.5	− 2473	34.5	× 55 / 431	4.4
5	90,243	2492.9	− 2502	−9.1	× 63 / 431	−1.3
6	90,244	2524.0	− 2531	−7	× 62 / 431	−1
7	90,245	2559.1	− 2552	7.1	× 107 / 431	1.8
8	90,246	2532.8	− 2567	−34.2	× 96 / 431	−7.6
Sum, rounded to a whole point						−4

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,131	2426.7	− 2432	−5.3	× 48 / 456	−0.6
4	90,132	2500.3	− 2473	27.3	× 62 / 456	3.7
5	90,133	2528.0	− 2502	26	× 64 / 456	3.6
6	90,134	2523.0	− 2531	−8	× 64 / 456	−1.1
7	90,135	2553.6	− 2552	1.6	× 113 / 456	0.4
8	90,136	2579.3	− 2567	12.3	× 105 / 456	2.8
Sum, rounded to a whole point						9

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,078	2441.3	− 2432	9.3	× 50 / 454	1
4	90,079	2482.7	− 2473	9.7	× 52 / 454	1.1
5	90,080	2500.7	− 2502	−1.3	× 62 / 454	−0.2
6	90,081	2541.7	− 2531	10.7	× 67 / 454	1.6
7	90,082	2538.9	− 2552	−13.1	× 117 / 454	−3.4
8	90,083	2590.1	− 2567	23.1	× 106 / 454	5.4
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	89,766	2462.6	− 2432	30.6	× 51 / 451	3.5
4	89,767	2498.7	− 2473	25.7	× 61 / 451	3.5
5	89,768	2508.9	− 2502	6.9	× 60 / 451	0.9
6	89,769	2527.7	− 2531	−3.3	× 65 / 451	−0.5
7	89,770	2567.0	− 2552	15	× 107 / 451	3.6
8	89,771	2581.1	− 2567	14.1	× 107 / 451	3.3
Sum, rounded to a whole point						14

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −15, −5, 6, −4, 9, 6, 14 → 1.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2017→2018: 10 · 2018→2019: 11 · 2019→2022: 10 · 2022→2023: 13 · 2023→2024: 3 · 2024→2025: 8 → average 9.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.2 × 2.66 = 24.5. Upper limit 26.1, lower limit −22.9.

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