Blair High: 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	36,254	2489.1	− 2531	−41.9	× 139 / 493	−11.8
7	36,255	2504.0	− 2552	−48	× 98 / 493	−9.5
8	36,258	2521.6	− 2567	−45.4	× 133 / 493	−12.2
11	36,259	2600.5	− 2583	17.5	× 123 / 493	4.4
Sum, rounded to a whole point						−29

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	33,838	2504.3	− 2531	−26.7	× 140 / 514	−7.3
7	33,840	2523.9	− 2552	−28.1	× 137 / 514	−7.5
8	33,842	2503.5	− 2567	−63.5	× 108 / 514	−13.3
11	33,844	2565.9	− 2583	−17.1	× 129 / 514	−4.3
Sum, rounded to a whole point						−32

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,429	2483.9	− 2531	−47.1	× 174 / 591	−13.9
7	34,431	2514.7	− 2552	−37.3	× 146 / 591	−9.2
8	34,433	2517.3	− 2567	−49.7	× 135 / 591	−11.4
11	34,435	2541.0	− 2583	−42	× 136 / 591	−9.7
Sum, rounded to a whole point						−44

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,432	2503.0	− 2531	−28	× 151 / 585	−7.2
7	34,434	2492.3	− 2552	−59.7	× 159 / 585	−16.2
8	34,436	2552.6	− 2567	−14.4	× 134 / 585	−3.3
11	34,438	2563.6	− 2583	−19.4	× 141 / 585	−4.7
Sum, rounded to a whole point						−31

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,599	2501.1	− 2531	−29.9	× 143 / 539	−7.9
7	34,600	2502.7	− 2552	−49.3	× 149 / 539	−13.6
8	34,601	2533.8	− 2567	−33.2	× 157 / 539	−9.7
11	34,602	2536.0	− 2583	−47	× 90 / 539	−7.8
Sum, rounded to a whole point						−39

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	33,793	2571.4	− 2583	−11.6	× 106 / 106	−11.6
Sum, rounded to a whole point						−12

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,540	2492.1	− 2531	−38.9	× 143 / 619	−9
7	34,541	2533.9	− 2552	−18.1	× 161 / 619	−4.7
8	34,542	2536.4	− 2567	−30.6	× 177 / 619	−8.7
11	34,543	2528.6	− 2583	−54.4	× 138 / 619	−12.1
Sum, rounded to a whole point						−35

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,603	2475.3	− 2531	−55.7	× 164 / 620	−14.7
7	34,604	2504.0	− 2552	−48	× 159 / 620	−12.3
8	34,605	2541.4	− 2567	−25.6	× 164 / 620	−6.8
11	34,606	2546.8	− 2583	−36.2	× 133 / 620	−7.8
Sum, rounded to a whole point						−42

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,457	2508.9	− 2531	−22.1	× 134 / 551	−5.4
7	34,458	2515.4	− 2552	−36.6	× 149 / 551	−9.9
8	34,459	2548.1	− 2567	−18.9	× 157 / 551	−5.4
11	34,460	2579.2	− 2583	−3.8	× 111 / 551	−0.8
Sum, rounded to a whole point						−21

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,304	2489.8	− 2531	−41.2	× 148 / 585	−10.4
7	34,305	2523.5	− 2552	−28.5	× 136 / 585	−6.6
8	34,306	2533.4	− 2567	−33.6	× 156 / 585	−9
11	34,307	2590.8	− 2583	7.8	× 145 / 585	1.9
Sum, rounded to a whole point						−24

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −29, −32, −44, −31, −39, −12, −35, −42, −21, −24 → −30.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 12 · 2017→2018: 13 · 2018→2019: 8 · 2019→2021: 27 · 2021→2022: 23 · 2022→2023: 7 · 2023→2024: 21 · 2024→2025: 3 → average 13
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13 × 2.66 = 34.6. Upper limit 3.7, lower limit −65.5.

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.