Loma Vista Environmental Science Academy: math

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	93,633	2380.8	− 2436	−55.2	× 68 / 304	−12.3
4	93,634	2410.7	− 2485	−74.3	× 63 / 304	−15.4
5	93,636	2436.3	− 2528	−91.7	× 51 / 304	−15.4
6	93,639	2435.6	− 2552	−116.4	× 51 / 304	−19.5
7	93,640	2430.3	− 2567	−136.7	× 37 / 304	−16.6
8	93,642	2428.6	− 2586	−157.4	× 34 / 304	−17.6
Sum, rounded to a whole point						−97

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,010	2351.7	− 2436	−84.3	× 71 / 337	−17.8
4	87,011	2428.9	− 2485	−56.1	× 73 / 337	−12.2
5	87,013	2434.1	− 2528	−93.9	× 68 / 337	−18.9
6	87,016	2453.1	− 2552	−98.9	× 47 / 337	−13.8
7	87,018	2463.6	− 2567	−103.4	× 38 / 337	−11.7
8	87,019	2452.1	− 2586	−133.9	× 40 / 337	−15.9
Sum, rounded to a whole point						−90

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,472	2394.4	− 2436	−41.6	× 62 / 344	−7.5
4	89,474	2391.6	− 2485	−93.4	× 85 / 344	−23.1
5	89,476	2434.8	− 2528	−93.2	× 72 / 344	−19.5
6	89,479	2402.0	− 2552	−150	× 51 / 344	−22.2
7	89,481	2475.4	− 2567	−91.6	× 43 / 344	−11.5
8	89,482	2465.1	− 2586	−120.9	× 31 / 344	−10.9
Sum, rounded to a whole point						−95

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,683	2364.3	− 2436	−71.7	× 60 / 347	−12.4
4	89,685	2399.0	− 2485	−86	× 63 / 347	−15.6
5	89,688	2401.9	− 2528	−126.1	× 79 / 347	−28.7
6	89,689	2436.2	− 2552	−115.8	× 62 / 347	−20.7
7	89,692	2430.7	− 2567	−136.3	× 42 / 347	−16.5
8	89,694	2483.7	− 2586	−102.3	× 41 / 347	−12.1
Sum, rounded to a whole point						−106

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,310	2347.6	− 2436	−88.4	× 58 / 325	−15.8
4	90,311	2357.3	− 2485	−127.7	× 63 / 325	−24.8
5	90,312	2429.3	− 2528	−98.7	× 61 / 325	−18.5
6	90,313	2412.1	− 2552	−139.9	× 56 / 325	−24.1
7	90,314	2433.0	− 2567	−134	× 50 / 325	−20.6
8	90,315	2428.2	− 2586	−157.8	× 37 / 325	−18
Sum, rounded to a whole point						−122

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,574	2345.7	− 2436	−90.3	× 41 / 216	−17.1
4	90,575	2402.7	− 2485	−82.3	× 35 / 216	−13.3
5	90,576	2482.2	− 2528	−45.8	× 24 / 216	−5.1
6	90,577	2421.7	− 2552	−130.3	× 57 / 216	−34.4
7	90,578	2411.9	− 2567	−155.1	× 26 / 216	−18.7
8	90,579	2430.9	− 2586	−155.1	× 33 / 216	−23.7
Sum, rounded to a whole point						−112

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,474	2336.8	− 2436	−99.2	× 55 / 234	−23.3
4	90,475	2373.3	− 2485	−111.7	× 43 / 234	−20.5
5	90,476	2465.7	− 2528	−62.3	× 38 / 234	−10.1
6	90,477	2425.3	− 2552	−126.7	× 29 / 234	−15.7
7	90,478	2418.3	− 2567	−148.7	× 48 / 234	−30.5
8	90,479	2422.0	− 2586	−164	× 21 / 234	−14.7
Sum, rounded to a whole point						−115

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,405	2344.0	− 2436	−92	× 40 / 256	−14.4
4	90,406	2387.7	− 2485	−97.3	× 54 / 256	−20.5
5	90,407	2437.1	− 2528	−90.9	× 43 / 256	−15.3
6	90,408	2489.1	− 2552	−62.9	× 32 / 256	−7.9
7	90,409	2456.7	− 2567	−110.3	× 31 / 256	−13.4
8	90,410	2412.2	− 2586	−173.8	× 56 / 256	−38
Sum, rounded to a whole point						−109

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,087	2341.6	− 2436	−94.4	× 52 / 234	−21
4	90,088	2386.0	− 2485	−99	× 37 / 234	−15.7
5	90,089	2407.8	− 2528	−120.2	× 57 / 234	−29.3
6	90,090	2404.4	− 2552	−147.6	× 28 / 234	−17.7
7	90,091	2526.5	− 2567	−40.5	× 30 / 234	−5.2
8	90,092	2460.0	− 2586	−126	× 30 / 234	−16.2
Sum, rounded to a whole point						−105

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −97, −90, −95, −106, −122, −112, −115, −109, −105 → −105.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 7 · 2016→2017: 5 · 2017→2018: 11 · 2018→2019: 16 · 2019→2022: 10 · 2022→2023: 3 · 2023→2024: 6 · 2024→2025: 4 → average 7.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.8 × 2.66 = 20.7. Upper limit −85, lower limit −126.4.

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.