Sierra Vista 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	32,075	2380.7	− 2432	−51.3	× 36 / 131	−14.1
4	32,077	2415.0	− 2473	−58	× 45 / 131	−19.9
5	32,079	2448.1	− 2502	−53.9	× 26 / 131	−10.7
6	32,081	2509.4	− 2531	−21.6	× 24 / 131	−4
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	30,290	2408.2	− 2432	−23.8	× 44 / 150	−7
4	30,291	2432.7	− 2473	−40.3	× 40 / 150	−10.7
5	30,293	2470.9	− 2502	−31.1	× 40 / 150	−8.3
6	30,295	2501.7	− 2531	−29.3	× 26 / 150	−5.1
Sum, rounded to a whole point						−31

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	30,854	2447.3	− 2432	15.3	× 35 / 153	3.5
4	30,857	2439.0	− 2473	−34	× 45 / 153	−10
5	30,859	2468.7	− 2502	−33.3	× 38 / 153	−8.3
6	30,860	2546.3	− 2531	15.3	× 35 / 153	3.5
Sum, rounded to a whole point						−11

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	30,902	2448.3	− 2432	16.3	× 24 / 130	3
4	30,904	2486.6	− 2473	13.6	× 35 / 130	3.7
5	30,906	2484.7	− 2502	−17.3	× 39 / 130	−5.2
6	30,908	2521.7	− 2531	−9.3	× 32 / 130	−2.3
Sum, rounded to a whole point						−1

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,073	2376.9	− 2432	−55.1	× 23 / 116	−10.9
4	31,074	2497.1	− 2473	24.1	× 24 / 116	5
5	31,075	2525.9	− 2502	23.9	× 36 / 116	7.4
6	31,076	2529.7	− 2531	−1.3	× 33 / 116	−0.4
Sum, rounded to a whole point						1

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,090	2432.5	− 2432	0.5	× 23 / 91	0.1
4	31,091	2496.0	− 2473	23	× 27 / 91	6.8
5	31,092	2517.9	− 2502	15.9	× 25 / 91	4.4
6	31,093	2494.6	− 2531	−36.4	× 16 / 91	−6.4
Sum, rounded to a whole point						5

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,147	2436.8	− 2432	4.8	× 20 / 96	1
4	31,148	2459.5	− 2473	−13.5	× 24 / 96	−3.4
5	31,149	2518.3	− 2502	16.3	× 26 / 96	4.4
6	31,150	2525.0	− 2531	−6	× 26 / 96	−1.6
Sum, rounded to a whole point						0

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,013	2466.3	− 2432	34.3	× 28 / 89	10.8
4	31,014	2514.1	− 2473	41.1	× 20 / 89	9.2
5	31,015	2540.5	− 2502	38.5	× 22 / 89	9.5
6	31,016	2572.9	− 2531	41.9	× 19 / 89	8.9
Sum, rounded to a whole point						38

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	30,872	2459.4	− 2432	27.4	× 21 / 94	6.1
4	30,873	2503.1	− 2473	30.1	× 30 / 94	9.6
5	30,874	2537.5	− 2502	35.5	× 22 / 94	8.3
6	30,875	2570.4	− 2531	39.4	× 21 / 94	8.8
Sum, rounded to a whole point						33

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −49, −31, −11, −1, 1, 5, 0, 38, 33 → −1.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 18 · 2016→2017: 20 · 2017→2018: 10 · 2018→2019: 2 · 2019→2022: 4 · 2022→2023: 5 · 2023→2024: 38 · 2024→2025: 5 → average 12.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.8 × 2.66 = 34. Upper limit 32.3, lower limit −35.7.

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.