Buena Vista Elementary: math

The shaded band is this district'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	100,250	2456.2	− 2436	20.2	× 20 / 122	3.3
4	100,251	2469.6	− 2485	−15.4	× 24 / 122	−3
5	100,254	2415.9	− 2528	−112.1	× 17 / 122	−15.6
6	100,255	2476.6	− 2552	−75.4	× 22 / 122	−13.6
7	100,258	2496.4	− 2567	−70.6	× 16 / 122	−9.3
8	100,259	2547.7	− 2586	−38.3	× 23 / 122	−7.2
Sum, rounded to a whole point						−45

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,954	2478.5	− 2436	42.5	× 22 / 134	7
4	92,957	2457.7	− 2485	−27.3	× 20 / 134	−4.1
5	92,958	2485.2	− 2528	−42.8	× 26 / 134	−8.3
6	92,960	2438.1	− 2552	−113.9	× 22 / 134	−18.7
7	92,962	2504.6	− 2567	−62.4	× 23 / 134	−10.7
8	92,964	2538.5	− 2586	−47.5	× 21 / 134	−7.4
Sum, rounded to a whole point						−42

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	95,720	2497.6	− 2436	61.6	× 21 / 136	9.5
4	95,722	2469.0	− 2485	−16	× 23 / 136	−2.7
5	95,725	2448.0	− 2528	−80	× 21 / 136	−12.4
6	95,727	2537.6	− 2552	−14.4	× 30 / 136	−3.2
7	95,729	2458.9	− 2567	−108.1	× 19 / 136	−15.1
8	95,730	2556.6	− 2586	−29.4	× 22 / 136	−4.8
Sum, rounded to a whole point						−29

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	95,907	2430.8	− 2436	−5.2	× 28 / 142	−1
4	95,909	2477.9	− 2485	−7.1	× 22 / 142	−1.1
5	95,911	2503.7	− 2528	−24.3	× 25 / 142	−4.3
6	95,913	2522.7	− 2552	−29.3	× 21 / 142	−4.3
7	95,915	2553.8	− 2567	−13.2	× 28 / 142	−2.6
8	95,917	2506.6	− 2586	−79.4	× 18 / 142	−10.1
Sum, rounded to a whole point						−23

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,592	2455.4	− 2436	19.4	× 22 / 143	3
4	96,593	2419.7	− 2485	−65.3	× 27 / 143	−12.3
5	96,594	2463.0	− 2528	−65	× 22 / 143	−10
6	96,595	2517.8	− 2552	−34.2	× 26 / 143	−6.2
7	96,596	2514.0	− 2567	−53	× 22 / 143	−8.2
8	96,597	2573.8	− 2586	−12.2	× 24 / 143	−2
Sum, rounded to a whole point						−36

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,782	2430.7	− 2436	−5.3	× 21 / 138	−0.8
4	96,783	2460.1	− 2485	−24.9	× 25 / 138	−4.5
5	96,784	2419.2	− 2528	−108.8	× 18 / 138	−14.2
6	96,785	2462.8	− 2552	−89.2	× 21 / 138	−13.6
7	96,786	2452.6	− 2567	−114.4	× 27 / 138	−22.4
8	96,787	2518.1	− 2586	−67.9	× 26 / 138	−12.8
Sum, rounded to a whole point						−68

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,625	2453.6	− 2436	17.6	× 16 / 132	2.1
4	96,626	2425.5	− 2485	−59.5	× 21 / 132	−9.5
5	96,627	2450.1	− 2528	−77.9	× 23 / 132	−13.6
6	96,628	2460.8	− 2552	−91.2	× 20 / 132	−13.8
7	96,629	2472.9	− 2567	−94.1	× 24 / 132	−17.1
8	96,630	2491.3	− 2586	−94.7	× 28 / 132	−20.1
Sum, rounded to a whole point						−72

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,517	2457.4	− 2436	21.4	× 17 / 117	3.1
4	96,518	2461.1	− 2485	−23.9	× 16 / 117	−3.3
5	96,519	2440.1	− 2528	−87.9	× 19 / 117	−14.3
6	96,520	2521.0	− 2552	−31	× 22 / 117	−5.8
7	96,521	2452.8	− 2567	−114.2	× 23 / 117	−22.4
8	96,522	2541.9	− 2586	−44.1	× 20 / 117	−7.5
Sum, rounded to a whole point						−50

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,245	2438.1	− 2436	2.1	× 15 / 114	0.3
4	96,246	2470.5	− 2485	−14.5	× 17 / 114	−2.2
5	96,247	2467.6	− 2528	−60.4	× 16 / 114	−8.5
6	96,248	2462.7	− 2552	−89.3	× 21 / 114	−16.5
7	96,249	2544.7	− 2567	−22.3	× 22 / 114	−4.3
8	96,250	2502.0	− 2586	−84	× 23 / 114	−16.9
Sum, rounded to a whole point						−48

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	95,869	2405.4	− 2436	−30.6	× 19 / 123	−4.7
4	95,870	2445.9	− 2485	−39.1	× 15 / 123	−4.8
5	95,871	2502.5	− 2528	−25.5	× 19 / 123	−3.9
6	95,872	2473.2	− 2552	−78.8	× 23 / 123	−14.7
7	95,873	2481.7	− 2567	−85.3	× 24 / 123	−16.6
8	95,874	2543.8	− 2586	−42.2	× 23 / 123	−7.9
Sum, rounded to a whole point						−53

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −45, −42, −29, −23, −36, −68, −72, −50, −48, −53 → −46.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 13 · 2017→2018: 6 · 2018→2019: 13 · 2019→2022: 32 · 2022→2023: 4 · 2023→2024: 22 · 2024→2025: 2 · 2025→2026: 5 → average 11.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.1 × 2.66 = 29.5. Upper limit −17.1, lower limit −76.1.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

Schools in Buena Vista Elementary

K–8 schools

Buena Vista Elementary