Jefferson Union High: english

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
11	82,958	2582.9	− 2583	−0.1	× 940 / 940	−0.1
Sum, rounded to a whole point						0

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	76,924	2588.3	− 2583	5.3	× 1037 / 1037	5.3
Sum, rounded to a whole point						5

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	79,005	2616.3	− 2583	33.3	× 1120 / 1120	33.3
Sum, rounded to a whole point						33

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	79,148	2604.5	− 2583	21.5	× 998 / 998	21.5
Sum, rounded to a whole point						22

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	79,672	2589.9	− 2583	6.9	× 1021 / 1021	6.9
Sum, rounded to a whole point						7

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	78,161	2647.2	− 2583	64.2	× 455 / 455	64.2
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
11	79,920	2608.2	− 2583	25.2	× 903 / 903	25.2
Sum, rounded to a whole point						25

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	79,890	2590.3	− 2583	7.3	× 866 / 866	7.3
Sum, rounded to a whole point						7

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	79,912	2592.3	− 2583	9.3	× 855 / 855	9.3
Sum, rounded to a whole point						9

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	79,578	2594.5	− 2583	11.5	× 897 / 897	11.5
Sum, rounded to a whole point						12

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	79,506	2586.8	− 2583	3.8	× 810 / 810	3.8
Sum, rounded to a whole point						4

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 0, 5, 33, 22, 7, 64, 25, 7, 9, 12, 4 → 17.1
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: 28 · 2017→2018: 11 · 2018→2019: 15 · 2019→2021: 57 · 2021→2022: 39 · 2022→2023: 18 · 2023→2024: 2 · 2024→2025: 3 · 2025→2026: 8 → average 18.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 18.6 × 2.66 = 49.5. Upper limit 66.6, lower limit −32.4.

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.

Jefferson Union High