Vanguard Preparatory: 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	69,687	2440.4	− 2436	4.4	× 120 / 884	0.6
4	69,689	2439.3	− 2485	−45.7	× 128 / 884	−6.6
5	69,691	2478.5	− 2528	−49.5	× 126 / 884	−7.1
6	69,693	2506.6	− 2552	−45.4	× 153 / 884	−7.9
7	69,695	2520.4	− 2567	−46.6	× 179 / 884	−9.4
8	69,697	2532.8	− 2586	−53.2	× 178 / 884	−10.7
Sum, rounded to a whole point						−41

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,601	2448.8	− 2436	12.8	× 119 / 834	1.8
4	64,604	2463.3	− 2485	−21.7	× 127 / 834	−3.3
5	64,605	2485.6	− 2528	−42.4	× 126 / 834	−6.4
6	64,607	2508.8	− 2552	−43.2	× 121 / 834	−6.3
7	64,610	2517.7	− 2567	−49.3	× 173 / 834	−10.2
8	64,611	2526.7	− 2586	−59.3	× 168 / 834	−11.9
Sum, rounded to a whole point						−36

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,418	2442.6	− 2436	6.6	× 118 / 828	0.9
4	66,419	2471.1	− 2485	−13.9	× 128 / 828	−2.1
5	66,421	2493.2	− 2528	−34.8	× 126 / 828	−5.3
6	66,424	2478.9	− 2552	−73.1	× 127 / 828	−11.2
7	66,426	2531.6	− 2567	−35.4	× 160 / 828	−6.8
8	66,427	2513.7	− 2586	−72.3	× 169 / 828	−14.8
Sum, rounded to a whole point						−39

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,489	2439.8	− 2436	3.8	× 118 / 813	0.6
4	66,491	2473.8	− 2485	−11.2	× 125 / 813	−1.7
5	66,493	2491.2	− 2528	−36.8	× 126 / 813	−5.7
6	66,495	2514.9	− 2552	−37.1	× 126 / 813	−5.7
7	66,497	2485.4	− 2567	−81.6	× 175 / 813	−17.6
8	66,499	2511.5	− 2586	−74.5	× 143 / 813	−13.1
Sum, rounded to a whole point						−43

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,915	2445.0	− 2436	9	× 119 / 846	1.3
4	66,916	2465.2	− 2485	−19.8	× 129 / 846	−3
5	66,917	2492.5	− 2528	−35.5	× 128 / 846	−5.4
6	66,918	2516.0	− 2552	−36	× 127 / 846	−5.4
7	66,919	2519.7	− 2567	−47.3	× 175 / 846	−9.8
8	66,920	2480.5	− 2586	−105.5	× 168 / 846	−21
Sum, rounded to a whole point						−43

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,023	2406.2	− 2436	−29.8	× 111 / 781	−4.2
4	67,024	2446.8	− 2485	−38.2	× 128 / 781	−6.3
5	67,025	2447.4	− 2528	−80.6	× 121 / 781	−12.5
6	67,026	2492.2	− 2552	−59.8	× 114 / 781	−8.7
7	67,027	2461.7	− 2567	−105.3	× 152 / 781	−20.5
8	67,028	2498.6	− 2586	−87.4	× 155 / 781	−17.3
Sum, rounded to a whole point						−70

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,021	2395.1	− 2436	−40.9	× 112 / 796	−5.8
4	67,022	2450.9	− 2485	−34.1	× 123 / 796	−5.3
5	67,023	2456.2	− 2528	−71.8	× 129 / 796	−11.6
6	67,024	2480.5	− 2552	−71.5	× 123 / 796	−11
7	67,025	2474.1	− 2567	−92.9	× 169 / 796	−19.7
8	67,026	2487.5	− 2586	−98.5	× 140 / 796	−17.3
Sum, rounded to a whole point						−71

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,011	2404.3	− 2436	−31.7	× 119 / 823	−4.6
4	67,012	2435.5	− 2485	−49.5	× 130 / 823	−7.8
5	67,013	2459.3	− 2528	−68.7	× 125 / 823	−10.4
6	67,014	2463.7	− 2552	−88.3	× 125 / 823	−13.4
7	67,015	2471.3	− 2567	−95.7	× 162 / 823	−18.8
8	67,016	2508.2	− 2586	−77.8	× 162 / 823	−15.3
Sum, rounded to a whole point						−70

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,757	2405.4	− 2436	−30.6	× 119 / 817	−4.5
4	66,758	2437.5	− 2485	−47.5	× 127 / 817	−7.4
5	66,759	2455.4	− 2528	−72.6	× 132 / 817	−11.7
6	66,760	2477.9	− 2552	−74.1	× 126 / 817	−11.4
7	66,761	2470.2	− 2567	−96.8	× 157 / 817	−18.6
8	66,762	2525.7	− 2586	−60.3	× 156 / 817	−11.5
Sum, rounded to a whole point						−65

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −41, −36, −39, −43, −43, −70, −71, −70, −65 → −53.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 5 · 2016→2017: 3 · 2017→2018: 4 · 2018→2019: 0 · 2019→2022: 27 · 2022→2023: 1 · 2023→2024: 1 · 2024→2025: 5 → average 5.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.8 × 2.66 = 15.4. Upper limit −37.7, lower limit −68.5.

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.