Vista High (Alternative): 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
11	7,582	2456.2	− 2628	−171.8	× 48 / 48	−171.8
Sum, rounded to a whole point						−172

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	6,765	2468.5	− 2586	−117.5	× 11 / 43	−30.1
11	6,766	2453.2	− 2628	−174.8	× 32 / 43	−130.1
Sum, rounded to a whole point						−160

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	6,977	2470.8	− 2586	−115.2	× 11 / 41	−30.9
11	6,978	2476.2	− 2628	−151.8	× 30 / 41	−111.1
Sum, rounded to a whole point						−142

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	6,997	2460.6	− 2628	−167.4	× 41 / 41	−167.4
Sum, rounded to a whole point						−167

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	7,040	2474.6	− 2628	−153.4	× 43 / 43	−153.4
Sum, rounded to a whole point						−153

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	6,975	2388.4	− 2436	−47.6	× 41 / 204	−9.6
4	6,976	2419.0	− 2485	−66	× 31 / 204	−10
5	6,977	2425.6	− 2528	−102.4	× 17 / 204	−8.5
6	6,978	2500.5	− 2552	−51.5	× 25 / 204	−6.3
7	6,979	2462.5	− 2567	−104.5	× 26 / 204	−13.3
8	6,980	2476.4	− 2586	−109.6	× 18 / 204	−9.7
11	6,981	2500.5	− 2628	−127.5	× 46 / 204	−28.8
Sum, rounded to a whole point						−86

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	6,961	2340.6	− 2436	−95.4	× 29 / 261	−10.6
4	6,962	2410.4	− 2485	−74.6	× 30 / 261	−8.6
5	6,963	2444.3	− 2528	−83.7	× 24 / 261	−7.7
6	6,964	2452.7	− 2552	−99.3	× 24 / 261	−9.1
7	6,965	2471.1	− 2567	−95.9	× 43 / 261	−15.8
8	6,966	2420.0	− 2586	−166	× 54 / 261	−34.3
11	6,967	2522.8	− 2628	−105.2	× 57 / 261	−23
Sum, rounded to a whole point						−109

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	6,910	2418.4	− 2436	−17.6	× 15 / 172	−1.5
4	6,911	2382.8	− 2485	−102.2	× 24 / 172	−14.3
5	6,912	2413.6	− 2528	−114.4	× 19 / 172	−12.6
6	6,913	2459.1	− 2552	−92.9	× 20 / 172	−10.8
7	6,914	2501.4	− 2567	−65.6	× 17 / 172	−6.5
8	6,915	2497.6	− 2586	−88.4	× 28 / 172	−14.4
11	6,916	2466.9	− 2628	−161.1	× 49 / 172	−45.9
Sum, rounded to a whole point						−106

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	6,870	2386.9	− 2436	−49.1	× 13 / 164	−3.9
4	6,871	2447.1	− 2485	−37.9	× 14 / 164	−3.2
5	6,872	2394.7	− 2528	−133.3	× 22 / 164	−17.9
6	6,873	2480.0	− 2552	−72	× 13 / 164	−5.7
7	6,874	2524.8	− 2567	−42.2	× 25 / 164	−6.4
8	6,875	2522.5	− 2586	−63.5	× 24 / 164	−9.3
11	6,876	2467.7	− 2628	−160.3	× 53 / 164	−51.8
Sum, rounded to a whole point						−98

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −172, −160, −142, −167, −153, −86, −109, −106, −98 → −132.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 12 · 2016→2017: 18 · 2017→2018: 25 · 2018→2019: 14 · 2019→2022: 67 · 2022→2023: 23 · 2023→2024: 3 · 2024→2025: 8 → average 21.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 21.3 × 2.66 = 56.7. Upper limit −75.9, lower limit −189.3.

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.