Stanley G. Oswalt Academy: 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.

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	39,881	2439.9	− 2436	3.9	× 103 / 704	0.6
4	39,883	2472.6	− 2485	−12.4	× 124 / 704	−2.2
5	39,885	2508.8	− 2528	−19.2	× 118 / 704	−3.2
6	39,887	2556.2	− 2552	4.2	× 120 / 704	0.7
7	39,889	2605.4	− 2567	38.4	× 114 / 704	6.2
8	39,891	2617.6	− 2586	31.6	× 125 / 704	5.6
Sum, rounded to a whole point						8

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,956	2466.8	− 2436	30.8	× 109 / 744	4.5
4	36,959	2476.9	− 2485	−8.1	× 131 / 744	−1.4
5	36,961	2510.2	− 2528	−17.8	× 133 / 744	−3.2
6	36,963	2562.5	− 2552	10.5	× 128 / 744	1.8
7	36,965	2591.7	− 2567	24.7	× 125 / 744	4.1
8	36,967	2641.6	− 2586	55.6	× 118 / 744	8.8
Sum, rounded to a whole point						15

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,736	2468.4	− 2436	32.4	× 109 / 719	4.9
4	37,739	2504.5	− 2485	19.5	× 108 / 719	2.9
5	37,741	2521.1	− 2528	−6.9	× 128 / 719	−1.2
6	37,742	2529.3	− 2552	−22.7	× 137 / 719	−4.3
7	37,744	2581.3	− 2567	14.3	× 125 / 719	2.5
8	37,746	2617.8	− 2586	31.8	× 112 / 719	5
Sum, rounded to a whole point						10

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,679	2452.8	− 2436	16.8	× 117 / 742	2.6
4	37,681	2496.2	− 2485	11.2	× 121 / 742	1.8
5	37,683	2530.4	− 2528	2.4	× 116 / 742	0.4
6	37,685	2541.0	− 2552	−11	× 131 / 742	−1.9
7	37,687	2577.2	− 2567	10.2	× 133 / 742	1.8
8	37,689	2599.9	− 2586	13.9	× 124 / 742	2.3
Sum, rounded to a whole point						7

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,892	2463.1	− 2436	27.1	× 111 / 733	4.1
4	37,893	2488.2	− 2485	3.2	× 121 / 733	0.5
5	37,894	2520.8	− 2528	−7.2	× 115 / 733	−1.1
6	37,895	2549.2	− 2552	−2.8	× 121 / 733	−0.5
7	37,896	2559.4	− 2567	−7.6	× 135 / 733	−1.4
8	37,897	2584.9	− 2586	−1.1	× 130 / 733	−0.2
Sum, rounded to a whole point						1

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,781	2452.9	− 2436	16.9	× 91 / 585	2.6
4	37,782	2505.6	− 2485	20.6	× 88 / 585	3.1
5	37,783	2505.8	− 2528	−22.2	× 100 / 585	−3.8
6	37,784	2520.9	− 2552	−31.1	× 107 / 585	−5.7
7	37,785	2596.9	− 2567	29.9	× 100 / 585	5.1
8	37,786	2594.8	− 2586	8.8	× 99 / 585	1.5
Sum, rounded to a whole point						3

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,826	2469.8	− 2436	33.8	× 95 / 587	5.5
4	37,827	2477.1	− 2485	−7.9	× 92 / 587	−1.2
5	37,828	2525.6	− 2528	−2.4	× 92 / 587	−0.4
6	37,829	2538.3	− 2552	−13.7	× 100 / 587	−2.3
7	37,830	2545.2	− 2567	−21.8	× 110 / 587	−4.1
8	37,831	2612.6	− 2586	26.6	× 98 / 587	4.4
Sum, rounded to a whole point						2

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,676	2471.2	− 2436	35.2	× 89 / 577	5.4
4	37,677	2496.2	− 2485	11.2	× 98 / 577	1.9
5	37,678	2504.9	− 2528	−23.1	× 95 / 577	−3.8
6	37,679	2550.3	− 2552	−1.7	× 91 / 577	−0.3
7	37,680	2538.9	− 2567	−28.1	× 99 / 577	−4.8
8	37,681	2599.8	− 2586	13.8	× 105 / 577	2.5
Sum, rounded to a whole point						1

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,453	2470.5	− 2436	34.5	× 100 / 582	5.9
4	37,454	2498.8	− 2485	13.8	× 92 / 582	2.2
5	37,455	2510.3	− 2528	−17.7	× 97 / 582	−3
6	37,456	2542.3	− 2552	−9.7	× 98 / 582	−1.6
7	37,457	2539.4	− 2567	−27.6	× 97 / 582	−4.6
8	37,458	2605.0	− 2586	19	× 98 / 582	3.2
Sum, rounded to a whole point						2

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 8, 15, 10, 7, 1, 3, 2, 1, 2 → 5.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 7 · 2016→2017: 5 · 2017→2018: 3 · 2018→2019: 6 · 2019→2022: 2 · 2022→2023: 1 · 2023→2024: 1 · 2024→2025: 1 → average 3.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 3.3 × 2.66 = 8.8. Upper limit 14.2, lower limit −3.4.

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. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.