Kern County Juvenile Court: math

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.

Measured against the grade 3 bar

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 11.

8th The average 8th grader scores 100 points under the grade 3 bar. 2336 vs. 2436. The 8th-grade bar is 2586.
11th The average 11th grader scores 70 points under the grade 3 bar. 2366 vs. 2436. The 11th-grade bar is 2628.

2026 results. "Meets standard" is the state's mark for being on track for that grade.

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
8	15,716	2379.8	− 2586	−206.2	× 18 / 79	−47
11	15,719	2387.4	− 2628	−240.6	× 61 / 79	−185.8
Sum, rounded to a whole point						−233

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	14,735	2376.4	− 2586	−209.6	× 14 / 100	−29.3
11	14,737	2404.2	− 2628	−223.8	× 86 / 100	−192.5
Sum, rounded to a whole point						−222

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	15,052	2359.7	− 2586	−226.3	× 22 / 128	−38.9
11	15,054	2393.3	− 2628	−234.7	× 106 / 128	−194.4
Sum, rounded to a whole point						−233

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	15,077	2339.3	− 2586	−246.7	× 20 / 96	−51.4
11	15,079	2387.5	− 2628	−240.5	× 76 / 96	−190.4
Sum, rounded to a whole point						−242

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	15,182	2371.7	− 2628	−256.3	× 66 / 66	−256.3
Sum, rounded to a whole point						−256

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	14,810	2382.6	− 2628	−245.4	× 43 / 43	−245.4
Sum, rounded to a whole point						−245

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	15,190	2365.7	− 2628	−262.3	× 43 / 43	−262.3
Sum, rounded to a whole point						−262

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	15,137	2326.9	− 2586	−259.1	× 13 / 47	−71.7
11	15,138	2369.1	− 2628	−258.9	× 34 / 47	−187.3
Sum, rounded to a whole point						−259

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	15,088	2339.9	− 2586	−246.1	× 15 / 69	−53.5
11	15,089	2377.1	− 2628	−250.9	× 54 / 69	−196.4
Sum, rounded to a whole point						−250

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	15,080	2355.4	− 2628	−272.6	× 58 / 58	−272.6
Sum, rounded to a whole point						−273

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
8	15,100	2336.3	− 2586	−249.7	× 15 / 58	−64.6
11	15,101	2365.6	− 2628	−262.4	× 43 / 58	−194.5
Sum, rounded to a whole point						−259

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −233, −222, −233, −242, −256, −245, −262, −259, −250, −273, −259 → −248.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 11 · 2016→2017: 11 · 2017→2018: 9 · 2018→2019: 14 · 2019→2021: 11 · 2021→2022: 17 · 2022→2023: 3 · 2023→2024: 9 · 2024→2025: 23 · 2025→2026: 14 → average 12.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.2 × 2.66 = 32.5. Upper limit −216, lower limit −281.

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.