Downtown College Prep - Alum Rock: 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
6	85,804	2472.6	− 2531	−58.4	× 102 / 318	−18.7
7	85,805	2526.0	− 2552	−26	× 116 / 318	−9.5
8	85,808	2511.4	− 2567	−55.6	× 100 / 318	−17.5
Sum, rounded to a whole point						−46

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	79,625	2491.4	− 2531	−39.6	× 110 / 396	−11
7	79,626	2506.7	− 2552	−45.3	× 123 / 396	−14.1
8	79,629	2525.8	− 2567	−41.2	× 123 / 396	−12.8
11	79,630	2616.4	− 2583	33.4	× 40 / 396	3.4
Sum, rounded to a whole point						−34

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	81,781	2500.6	− 2531	−30.4	× 117 / 430	−8.3
7	81,784	2501.4	− 2552	−50.6	× 119 / 430	−14
8	81,785	2494.6	− 2567	−72.4	× 121 / 430	−20.4
11	81,787	2568.4	− 2583	−14.6	× 73 / 430	−2.5
Sum, rounded to a whole point						−45

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	81,969	2482.9	− 2531	−48.1	× 128 / 418	−14.7
7	81,971	2495.3	− 2552	−56.7	× 100 / 418	−13.6
8	81,973	2518.5	− 2567	−48.5	× 117 / 418	−13.6
11	81,975	2577.6	− 2583	−5.4	× 73 / 418	−0.9
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
6	82,585	2470.1	− 2531	−60.9	× 127 / 416	−18.6
7	82,586	2513.1	− 2552	−38.9	× 124 / 416	−11.6
8	82,587	2544.4	− 2567	−22.6	× 92 / 416	−5
11	82,588	2596.1	− 2583	13.1	× 73 / 416	2.3
Sum, rounded to a whole point						−33

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	80,895	2460.0	− 2531	−71	× 84 / 339	−17.6
7	80,896	2499.6	− 2552	−52.4	× 107 / 339	−16.5
8	80,897	2493.1	− 2567	−73.9	× 105 / 339	−22.9
11	80,898	2551.0	− 2583	−32	× 43 / 339	−4.1
Sum, rounded to a whole point						−61

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	82,782	2474.0	− 2531	−57	× 93 / 336	−15.8
7	82,783	2500.3	− 2552	−51.7	× 82 / 336	−12.6
8	82,784	2532.7	− 2567	−34.3	× 111 / 336	−11.3
11	82,785	2578.8	− 2583	−4.2	× 50 / 336	−0.6
Sum, rounded to a whole point						−40

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	82,756	2468.4	− 2531	−62.6	× 84 / 299	−17.6
7	82,757	2492.2	− 2552	−59.8	× 86 / 299	−17.2
8	82,758	2484.5	− 2567	−82.5	× 74 / 299	−20.4
11	82,759	2560.1	− 2583	−22.9	× 55 / 299	−4.2
Sum, rounded to a whole point						−59

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	82,766	2471.9	− 2531	−59.1	× 71 / 297	−14.1
7	82,767	2473.8	− 2552	−78.2	× 80 / 297	−21.1
8	82,768	2484.0	− 2567	−83	× 85 / 297	−23.8
11	82,769	2552.3	− 2583	−30.7	× 61 / 297	−6.3
Sum, rounded to a whole point						−65

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	82,444	2484.8	− 2531	−46.2	× 56 / 178	−14.5
7	82,445	2526.2	− 2552	−25.8	× 53 / 178	−7.7
8	82,446	2513.1	− 2567	−53.9	× 69 / 178	−20.9
Sum, rounded to a whole point						−43

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −46, −34, −45, −43, −33, −61, −40, −59, −65, −43 → −46.9
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: 11 · 2017→2018: 2 · 2018→2019: 10 · 2019→2021: 28 · 2021→2022: 21 · 2022→2023: 19 · 2023→2024: 6 · 2024→2025: 22 → average 14.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 14.6 × 2.66 = 38.8. Upper limit −8.1, lower limit −85.7.

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.