Los Osos Middle: 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 bars

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 8.

6th The average 6th grader scores 18 points under the grade 6 bar. 2534 vs. 2552.
7th The average 7th grader meets the grade 7 bar. 2576 vs. 2567.
8th The average 8th grader scores just under the grade 7 bar. 2566 vs. 2567. The 8th-grade bar is 2586.

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
6	82,011	2526.3	− 2552	−25.7	× 210 / 581	−9.3
7	82,012	2521.3	− 2567	−45.7	× 174 / 581	−13.7
8	82,015	2566.4	− 2586	−19.6	× 197 / 581	−6.6
Sum, rounded to a whole point						−30

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	76,057	2567.8	− 2552	15.8	× 200 / 600	5.3
7	76,058	2576.6	− 2567	9.6	× 227 / 600	3.6
8	76,060	2567.6	− 2586	−18.4	× 173 / 600	−5.3
Sum, rounded to a whole point						4

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	78,093	2538.0	− 2552	−14	× 170 / 594	−4
7	78,096	2591.9	− 2567	24.9	× 212 / 594	8.9
8	78,098	2591.7	− 2586	5.7	× 212 / 594	2
Sum, rounded to a whole point						7

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	78,248	2558.5	− 2552	6.5	× 174 / 572	2
7	78,251	2574.0	− 2567	7	× 185 / 572	2.3
8	78,252	2609.9	− 2586	23.9	× 213 / 572	8.9
Sum, rounded to a whole point						13

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	78,778	2543.5	− 2552	−8.5	× 157 / 542	−2.5
7	78,779	2596.2	− 2567	29.2	× 203 / 542	10.9
8	78,780	2593.5	− 2586	7.5	× 182 / 542	2.5
Sum, rounded to a whole point						11

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	77,339	2536.9	− 2552	−15.1	× 156 / 492	−4.8
7	77,340	2544.3	− 2567	−22.7	× 180 / 492	−8.3
8	77,341	2559.6	− 2586	−26.4	× 156 / 492	−8.4
Sum, rounded to a whole point						−21

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	79,046	2537.3	− 2552	−14.7	× 123 / 503	−3.6
7	79,047	2561.9	− 2567	−5.1	× 195 / 503	−2
8	79,048	2559.4	− 2586	−26.6	× 185 / 503	−9.8
Sum, rounded to a whole point						−15

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	79,028	2539.2	− 2552	−12.8	× 158 / 497	−4.1
7	79,029	2551.2	− 2567	−15.8	× 161 / 497	−5.1
8	79,030	2567.1	− 2586	−18.9	× 178 / 497	−6.8
Sum, rounded to a whole point						−16

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	79,054	2533.7	− 2552	−18.3	× 133 / 462	−5.3
7	79,055	2566.7	− 2567	−0.3	× 176 / 462	−0.1
8	79,056	2557.6	− 2586	−28.4	× 153 / 462	−9.4
Sum, rounded to a whole point						−15

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	78,732	2561.6	− 2552	9.6	× 134 / 472	2.7
7	78,733	2563.5	− 2567	−3.5	× 167 / 472	−1.2
8	78,734	2575.7	− 2586	−10.3	× 171 / 472	−3.7
Sum, rounded to a whole point						−2

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	78,652	2533.8	− 2552	−18.2	× 128 / 466	−5
7	78,653	2576.3	− 2567	9.3	× 171 / 466	3.4
8	78,654	2566.4	− 2586	−19.6	× 167 / 466	−7
Sum, rounded to a whole point						−9

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −30, 4, 7, 13, 11, −21, −15, −16, −15, −2, −9 → −6.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 34 · 2016→2017: 3 · 2017→2018: 6 · 2018→2019: 2 · 2019→2021: 32 · 2021→2022: 6 · 2022→2023: 1 · 2023→2024: 1 · 2024→2025: 13 · 2025→2026: 7 → average 10.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.5 × 2.66 = 27.9. Upper limit 21.3, lower limit −34.5.

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.