Black Oak Mine Unified: math

The shaded band is this district'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	9,421	2384.6	− 2436	−51.4	× 97 / 650	−7.7
4	9,422	2436.5	− 2485	−48.5	× 96 / 650	−7.2
5	9,425	2491.3	− 2528	−36.7	× 96 / 650	−5.4
6	9,426	2512.7	− 2552	−39.3	× 100 / 650	−6
7	9,429	2513.8	− 2567	−53.2	× 87 / 650	−7.1
8	9,430	2512.7	− 2586	−73.3	× 92 / 650	−10.4
11	9,433	2575.8	− 2628	−52.2	× 82 / 650	−6.6
Sum, rounded to a whole point						−50

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,478	2399.2	− 2436	−36.8	× 113 / 685	−6.1
4	8,480	2431.4	− 2485	−53.6	× 96 / 685	−7.5
5	8,483	2477.6	− 2528	−50.4	× 102 / 685	−7.5
6	8,485	2522.2	− 2552	−29.8	× 96 / 685	−4.2
7	8,486	2521.0	− 2567	−46	× 100 / 685	−6.7
8	8,489	2523.0	− 2586	−63	× 82 / 685	−7.5
11	8,490	2546.4	− 2628	−81.6	× 96 / 685	−11.4
Sum, rounded to a whole point						−51

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,774	2389.0	− 2436	−47	× 90 / 670	−6.3
4	8,776	2439.9	− 2485	−45.1	× 108 / 670	−7.3
5	8,779	2449.6	− 2528	−78.4	× 93 / 670	−10.9
6	8,781	2530.6	− 2552	−21.4	× 97 / 670	−3.1
7	8,783	2510.0	− 2567	−57	× 90 / 670	−7.7
8	8,785	2521.9	− 2586	−64.1	× 102 / 670	−9.8
11	8,787	2563.8	− 2628	−64.2	× 90 / 670	−8.6
Sum, rounded to a whole point						−54

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,798	2426.1	− 2436	−9.9	× 86 / 621	−1.4
4	8,801	2439.6	− 2485	−45.4	× 96 / 621	−7
5	8,802	2473.0	− 2528	−55	× 106 / 621	−9.4
6	8,805	2500.4	− 2552	−51.6	× 90 / 621	−7.5
7	8,806	2533.5	− 2567	−33.5	× 91 / 621	−4.9
8	8,809	2535.7	− 2586	−50.3	× 85 / 621	−6.9
11	8,810	2564.6	− 2628	−63.4	× 67 / 621	−6.8
Sum, rounded to a whole point						−44

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,860	2412.0	− 2436	−24	× 86 / 658	−3.1
4	8,861	2462.9	− 2485	−22.1	× 97 / 658	−3.3
5	8,862	2460.1	− 2528	−67.9	× 102 / 658	−10.5
6	8,863	2499.8	− 2552	−52.2	× 103 / 658	−8.2
7	8,864	2503.3	− 2567	−63.7	× 94 / 658	−9.1
8	8,865	2525.6	− 2586	−60.4	× 93 / 658	−8.5
11	8,866	2538.7	− 2628	−89.3	× 83 / 658	−11.3
Sum, rounded to a whole point						−54

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,694	2393.5	− 2436	−42.5	× 76 / 576	−5.6
4	8,695	2442.4	− 2485	−42.6	× 85 / 576	−6.3
5	8,696	2475.8	− 2528	−52.2	× 82 / 576	−7.4
6	8,697	2517.9	− 2552	−34.1	× 86 / 576	−5.1
7	8,698	2482.4	− 2567	−84.6	× 82 / 576	−12
8	8,699	2481.6	− 2586	−104.4	× 87 / 576	−15.8
11	8,700	2544.2	− 2628	−83.8	× 78 / 576	−11.3
Sum, rounded to a whole point						−64

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,807	2407.9	− 2436	−28.1	× 88 / 649	−3.8
4	8,808	2424.7	− 2485	−60.3	× 84 / 649	−7.8
5	8,809	2490.3	− 2528	−37.7	× 93 / 649	−5.4
6	8,810	2525.0	− 2552	−27	× 88 / 649	−3.7
7	8,811	2517.5	− 2567	−49.5	× 101 / 649	−7.7
8	8,812	2513.8	− 2586	−72.2	× 97 / 649	−10.8
11	8,813	2529.7	− 2628	−98.3	× 98 / 649	−14.8
Sum, rounded to a whole point						−54

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,781	2414.7	− 2436	−21.3	× 101 / 644	−3.3
4	8,782	2434.7	− 2485	−50.3	× 82 / 644	−6.4
5	8,783	2455.8	− 2528	−72.2	× 83 / 644	−9.3
6	8,784	2524.3	− 2552	−27.7	× 90 / 644	−3.9
7	8,785	2500.4	− 2567	−66.6	× 88 / 644	−9.1
8	8,786	2517.1	− 2586	−68.9	× 104 / 644	−11.1
11	8,787	2505.0	− 2628	−123	× 96 / 644	−18.3
Sum, rounded to a whole point						−61

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,735	2407.5	− 2436	−28.5	× 91 / 624	−4.2
4	8,736	2446.0	− 2485	−39	× 102 / 624	−6.4
5	8,737	2456.4	− 2528	−71.6	× 83 / 624	−9.5
6	8,738	2509.4	− 2552	−42.6	× 79 / 624	−5.4
7	8,739	2500.1	− 2567	−66.9	× 89 / 624	−9.5
8	8,740	2516.0	− 2586	−70	× 88 / 624	−9.9
11	8,741	2521.0	− 2628	−107	× 92 / 624	−15.8
Sum, rounded to a whole point						−61

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,698	2423.4	− 2436	−12.6	× 86 / 593	−1.8
4	8,699	2460.5	− 2485	−24.5	× 83 / 593	−3.4
5	8,700	2481.9	− 2528	−46.1	× 98 / 593	−7.6
6	8,701	2508.7	− 2552	−43.3	× 83 / 593	−6.1
7	8,702	2480.5	− 2567	−86.5	× 73 / 593	−10.6
8	8,703	2514.4	− 2586	−71.6	× 86 / 593	−10.4
11	8,704	2533.2	− 2628	−94.8	× 84 / 593	−13.4
Sum, rounded to a whole point						−53

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	8,716	2405.4	− 2436	−30.6	× 90 / 620	−4.4
4	8,717	2448.7	− 2485	−36.3	× 81 / 620	−4.7
5	8,718	2484.9	− 2528	−43.1	× 88 / 620	−6.1
6	8,719	2526.7	− 2552	−25.3	× 98 / 620	−4
7	8,720	2499.3	− 2567	−67.7	× 81 / 620	−8.8
8	8,721	2496.7	− 2586	−89.3	× 74 / 620	−10.7
11	8,722	2539.7	− 2628	−88.3	× 108 / 620	−15.4
Sum, rounded to a whole point						−54

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −50, −51, −54, −44, −54, −64, −54, −61, −61, −53, −54 → −54.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 1 · 2016→2017: 3 · 2017→2018: 10 · 2018→2019: 10 · 2019→2021: 10 · 2021→2022: 10 · 2022→2023: 7 · 2023→2024: 0 · 2024→2025: 8 · 2025→2026: 1 → average 6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6 × 2.66 = 16. Upper limit −38.5, lower limit −70.5.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

Black Oak Mine Unified