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	9,920	2399.2	− 2432	−32.8	× 67 / 262	−8.4
4	9,922	2430.4	− 2473	−42.6	× 66 / 262	−10.7
5	9,925	2486.7	− 2502	−15.3	× 74 / 262	−4.3
6	9,926	2510.7	− 2531	−20.3	× 55 / 262	−4.3
Sum, rounded to a whole point						−28

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,973	2396.5	− 2432	−35.5	× 63 / 278	−8
4	8,975	2453.9	− 2473	−19.1	× 75 / 278	−5.2
5	8,977	2492.8	− 2502	−9.2	× 68 / 278	−2.3
6	8,979	2532.5	− 2531	1.5	× 72 / 278	0.4
Sum, rounded to a whole point						−15

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,281	2446.5	− 2432	14.5	× 58 / 262	3.2
4	9,282	2458.2	− 2473	−14.8	× 65 / 262	−3.7
5	9,285	2493.2	− 2502	−8.8	× 80 / 262	−2.7
6	9,286	2532.2	− 2531	1.2	× 59 / 262	0.3
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	9,303	2441.1	− 2432	9.1	× 58 / 255	2.1
4	9,304	2466.0	− 2473	−7	× 60 / 255	−1.6
5	9,307	2492.9	− 2502	−9.1	× 65 / 255	−2.3
6	9,309	2528.4	− 2531	−2.6	× 72 / 255	−0.7
Sum, rounded to a whole point						−3

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,374	2430.0	− 2432	−2	× 76 / 274	−0.6
4	9,375	2484.0	− 2473	11	× 62 / 274	2.5
5	9,376	2509.8	− 2502	7.8	× 68 / 274	1.9
6	9,377	2541.3	− 2531	10.3	× 68 / 274	2.6
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	9,343	2382.3	− 2432	−49.7	× 63 / 253	−12.4
4	9,344	2449.8	− 2473	−23.2	× 58 / 253	−5.3
5	9,345	2470.9	− 2502	−31.1	× 59 / 253	−7.3
6	9,346	2511.0	− 2531	−20	× 73 / 253	−5.8
Sum, rounded to a whole point						−31

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,319	2411.6	− 2432	−20.4	× 68 / 261	−5.3
4	9,320	2450.4	− 2473	−22.6	× 64 / 261	−5.5
5	9,321	2467.8	− 2502	−34.2	× 64 / 261	−8.4
6	9,322	2497.9	− 2531	−33.1	× 65 / 261	−8.2
Sum, rounded to a whole point						−27

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,275	2403.1	− 2432	−28.9	× 67 / 257	−7.5
4	9,276	2455.2	− 2473	−17.8	× 60 / 257	−4.2
5	9,277	2444.6	− 2502	−57.4	× 68 / 257	−15.2
6	9,278	2493.0	− 2531	−38	× 62 / 257	−9.2
Sum, rounded to a whole point						−36

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,256	2400.2	− 2432	−31.8	× 70 / 259	−8.6
4	9,257	2457.6	− 2473	−15.4	× 68 / 259	−4
5	9,258	2483.2	− 2502	−18.8	× 58 / 259	−4.2
6	9,259	2506.9	− 2531	−24.1	× 63 / 259	−5.9
Sum, rounded to a whole point						−23

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −28, −15, −3, −3, 6, −31, −27, −36, −23 → −17.8
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: 12 · 2017→2018: 0 · 2018→2019: 9 · 2019→2022: 37 · 2022→2023: 4 · 2023→2024: 9 · 2024→2025: 13 → average 12.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.1 × 2.66 = 32.2. Upper limit 14.4, lower limit −50.

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.