Aveson Global Leadership 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
6	36,194	2508.8	− 2552	−43.2	× 69 / 233	−12.8
7	36,195	2484.7	− 2567	−82.3	× 67 / 233	−23.7
8	36,198	2452.5	− 2586	−133.5	× 79 / 233	−45.3
11	36,199	2489.3	− 2628	−138.7	× 18 / 233	−10.7
Sum, rounded to a whole point						−92

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	33,779	2481.7	− 2552	−70.3	× 57 / 235	−17.1
7	33,780	2519.9	− 2567	−47.1	× 70 / 235	−14
8	33,783	2472.7	− 2586	−113.3	× 67 / 235	−32.3
11	33,785	2505.3	− 2628	−122.7	× 41 / 235	−21.4
Sum, rounded to a whole point						−85

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,368	2503.9	− 2552	−48.1	× 76 / 269	−13.6
7	34,371	2526.9	− 2567	−40.1	× 68 / 269	−10.1
8	34,372	2539.1	− 2586	−46.9	× 71 / 269	−12.4
11	34,374	2528.6	− 2628	−99.4	× 54 / 269	−20
Sum, rounded to a whole point						−56

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,374	2495.5	− 2552	−56.5	× 66 / 260	−14.3
7	34,375	2542.2	− 2567	−24.8	× 76 / 260	−7.2
8	34,378	2530.8	− 2586	−55.2	× 67 / 260	−14.2
11	34,379	2502.9	− 2628	−125.1	× 51 / 260	−24.5
Sum, rounded to a whole point						−60

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,540	2509.9	− 2552	−42.1	× 64 / 253	−10.6
7	34,541	2531.7	− 2567	−35.3	× 66 / 253	−9.2
8	34,542	2543.8	− 2586	−42.2	× 77 / 253	−12.8
11	34,543	2566.1	− 2628	−61.9	× 46 / 253	−11.3
Sum, rounded to a whole point						−44

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,471	2453.7	− 2552	−98.3	× 31 / 139	−21.9
7	34,472	2502.3	− 2567	−64.7	× 33 / 139	−15.4
8	34,473	2465.4	− 2586	−120.6	× 52 / 139	−45.1
11	34,474	2571.4	− 2628	−56.6	× 23 / 139	−9.4
Sum, rounded to a whole point						−92

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,530	2465.3	− 2552	−86.7	× 38 / 138	−23.9
7	34,531	2473.9	− 2567	−93.1	× 29 / 138	−19.6
8	34,532	2501.1	− 2586	−84.9	× 38 / 138	−23.4
11	34,533	2485.4	− 2628	−142.6	× 33 / 138	−34.1
Sum, rounded to a whole point						−101

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,382	2501.6	− 2552	−50.4	× 31 / 125	−12.5
7	34,383	2497.4	− 2567	−69.6	× 38 / 125	−21.2
8	34,384	2447.6	− 2586	−138.4	× 31 / 125	−34.3
11	34,385	2512.3	− 2628	−115.7	× 25 / 125	−23.1
Sum, rounded to a whole point						−91

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	34,229	2518.7	− 2552	−33.3	× 28 / 115	−8.1
7	34,230	2516.1	− 2567	−50.9	× 29 / 115	−12.8
8	34,231	2484.8	− 2586	−101.2	× 38 / 115	−33.4
11	34,232	2447.2	− 2628	−180.8	× 20 / 115	−31.4
Sum, rounded to a whole point						−86

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −92, −85, −56, −60, −44, −92, −101, −91, −86 → −78.6
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: 29 · 2017→2018: 4 · 2018→2019: 16 · 2019→2022: 48 · 2022→2023: 9 · 2023→2024: 10 · 2024→2025: 5 → average 16
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 16 × 2.66 = 42.6. Upper limit −36, lower limit −121.2.

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.