Vanguard Preparatory: 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	69,688	2439.5	− 2432	7.5	× 120 / 883	1
4	69,690	2434.7	− 2473	−38.3	× 128 / 883	−5.6
5	69,692	2478.3	− 2502	−23.7	× 126 / 883	−3.4
6	69,694	2519.9	− 2531	−11.1	× 153 / 883	−1.9
7	69,696	2528.9	− 2552	−23.1	× 179 / 883	−4.7
8	69,698	2555.2	− 2567	−11.8	× 177 / 883	−2.4
Sum, rounded to a whole point						−17

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,602	2443.1	− 2432	11.1	× 119 / 834	1.6
4	64,603	2478.3	− 2473	5.3	× 127 / 834	0.8
5	64,606	2498.8	− 2502	−3.2	× 126 / 834	−0.5
6	64,608	2518.3	− 2531	−12.7	× 121 / 834	−1.8
7	64,609	2546.3	− 2552	−5.7	× 173 / 834	−1.2
8	64,612	2555.2	− 2567	−11.8	× 168 / 834	−2.4
Sum, rounded to a whole point						−3

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,417	2432.4	− 2432	0.4	× 118 / 827	0.1
4	66,420	2476.6	− 2473	3.6	× 128 / 827	0.6
5	66,422	2512.8	− 2502	10.8	× 126 / 827	1.6
6	66,423	2511.5	− 2531	−19.5	× 127 / 827	−3
7	66,425	2547.7	− 2552	−4.3	× 159 / 827	−0.8
8	66,428	2571.5	− 2567	4.5	× 169 / 827	0.9
Sum, rounded to a whole point						−1

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,490	2446.0	− 2432	14	× 118 / 813	2
4	66,492	2474.0	− 2473	1	× 125 / 813	0.2
5	66,494	2495.4	− 2502	−6.6	× 126 / 813	−1
6	66,496	2528.5	− 2531	−2.5	× 126 / 813	−0.4
7	66,498	2533.1	− 2552	−18.9	× 175 / 813	−4.1
8	66,500	2551.9	− 2567	−15.1	× 143 / 813	−2.7
Sum, rounded to a whole point						−6

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,908	2444.4	− 2432	12.4	× 119 / 846	1.7
4	66,909	2465.1	− 2473	−7.9	× 129 / 846	−1.2
5	66,910	2515.2	− 2502	13.2	× 128 / 846	2
6	66,911	2536.6	− 2531	5.6	× 127 / 846	0.8
7	66,912	2552.7	− 2552	0.7	× 175 / 846	0.1
8	66,913	2529.6	− 2567	−37.4	× 168 / 846	−7.4
Sum, rounded to a whole point						−4

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,016	2409.7	− 2432	−22.3	× 111 / 781	−3.2
4	67,017	2435.1	− 2473	−37.9	× 128 / 781	−6.2
5	67,018	2450.4	− 2502	−51.6	× 121 / 781	−8
6	67,019	2490.2	− 2531	−40.8	× 113 / 781	−5.9
7	67,020	2519.1	− 2552	−32.9	× 152 / 781	−6.4
8	67,021	2548.8	− 2567	−18.2	× 156 / 781	−3.6
Sum, rounded to a whole point						−33

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,014	2387.1	− 2432	−44.9	× 112 / 796	−6.3
4	67,015	2442.4	− 2473	−30.6	× 123 / 796	−4.7
5	67,016	2447.9	− 2502	−54.1	× 129 / 796	−8.8
6	67,017	2475.6	− 2531	−55.4	× 123 / 796	−8.6
7	67,018	2521.7	− 2552	−30.3	× 169 / 796	−6.4
8	67,019	2506.0	− 2567	−61	× 140 / 796	−10.7
Sum, rounded to a whole point						−46

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,004	2386.7	− 2432	−45.3	× 119 / 827	−6.5
4	67,005	2425.4	− 2473	−47.6	× 130 / 827	−7.5
5	67,006	2456.8	− 2502	−45.2	× 126 / 827	−6.9
6	67,007	2476.1	− 2531	−54.9	× 127 / 827	−8.4
7	67,008	2510.5	− 2552	−41.5	× 163 / 827	−8.2
8	67,009	2532.2	− 2567	−34.8	× 162 / 827	−6.8
Sum, rounded to a whole point						−44

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,750	2387.0	− 2432	−45	× 119 / 817	−6.6
4	66,751	2429.6	− 2473	−43.4	× 127 / 817	−6.7
5	66,752	2471.4	− 2502	−30.6	× 132 / 817	−4.9
6	66,753	2486.7	− 2531	−44.3	× 126 / 817	−6.8
7	66,754	2527.1	− 2552	−24.9	× 157 / 817	−4.8
8	66,755	2561.2	− 2567	−5.8	× 156 / 817	−1.1
Sum, rounded to a whole point						−31

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −17, −3, −1, −6, −4, −33, −46, −44, −31 → −20.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 14 · 2016→2017: 2 · 2017→2018: 5 · 2018→2019: 2 · 2019→2022: 29 · 2022→2023: 13 · 2023→2024: 2 · 2024→2025: 13 → average 10
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10 × 2.66 = 26.6. Upper limit 6, lower limit −47.2.

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.