Stockton Collegiate International Secondary: 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	80,617	2492.6	− 2552	−59.4	× 81 / 298	−16.1
7	80,619	2522.0	− 2567	−45	× 82 / 298	−12.4
8	80,621	2534.7	− 2586	−51.3	× 80 / 298	−13.8
11	80,623	2605.2	− 2628	−22.8	× 55 / 298	−4.2
Sum, rounded to a whole point						−47

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	74,718	2492.5	− 2552	−59.5	× 82 / 295	−16.5
7	74,721	2516.8	− 2567	−50.2	× 80 / 295	−13.6
8	74,722	2522.9	− 2586	−63.1	× 78 / 295	−16.7
11	74,724	2594.8	− 2628	−33.2	× 55 / 295	−6.2
Sum, rounded to a whole point						−53

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	76,704	2482.6	− 2552	−69.4	× 89 / 313	−19.7
7	76,706	2493.0	− 2567	−74	× 90 / 313	−21.3
8	76,708	2520.6	− 2586	−65.4	× 87 / 313	−18.2
11	76,710	2645.3	− 2628	17.3	× 47 / 313	2.6
Sum, rounded to a whole point						−57

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	76,886	2474.1	− 2552	−77.9	× 82 / 317	−20.2
7	76,889	2509.3	− 2567	−57.7	× 88 / 317	−16
8	76,890	2484.9	− 2586	−101.1	× 89 / 317	−28.4
11	76,893	2607.7	− 2628	−20.3	× 58 / 317	−3.7
Sum, rounded to a whole point						−68

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	77,391	2489.0	− 2552	−63	× 90 / 314	−18.1
7	77,392	2497.3	− 2567	−69.7	× 89 / 314	−19.8
8	77,393	2508.2	− 2586	−77.8	× 90 / 314	−22.3
11	77,394	2600.5	− 2628	−27.5	× 45 / 314	−3.9
Sum, rounded to a whole point						−64

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	75,924	2493.7	− 2552	−58.3	× 51 / 192	−15.5
7	75,925	2464.1	− 2567	−102.9	× 51 / 192	−27.3
8	75,926	2500.0	− 2586	−86	× 48 / 192	−21.5
11	75,927	2570.8	− 2628	−57.2	× 42 / 192	−12.5
Sum, rounded to a whole point						−77

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	77,543	2446.9	− 2552	−105.1	× 72 / 290	−26.1
7	77,544	2501.4	− 2567	−65.6	× 83 / 290	−18.8
8	77,545	2458.5	− 2586	−127.5	× 84 / 290	−36.9
11	77,546	2566.5	− 2628	−61.5	× 51 / 290	−10.8
Sum, rounded to a whole point						−93

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	77,529	2461.6	− 2552	−90.4	× 74 / 275	−24.3
7	77,530	2463.5	− 2567	−103.5	× 73 / 275	−27.5
8	77,531	2480.2	− 2586	−105.8	× 76 / 275	−29.2
11	77,532	2577.9	− 2628	−50.1	× 52 / 275	−9.5
Sum, rounded to a whole point						−91

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	77,529	2441.9	− 2552	−110.1	× 78 / 274	−31.3
7	77,530	2491.9	− 2567	−75.1	× 73 / 274	−20
8	77,531	2447.1	− 2586	−138.9	× 75 / 274	−38
11	77,532	2546.4	− 2628	−81.6	× 48 / 274	−14.3
Sum, rounded to a whole point						−104

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	77,183	2387.8	− 2552	−164.2	× 78 / 278	−46.1
7	77,184	2446.7	− 2567	−120.3	× 80 / 278	−34.6
8	77,185	2479.6	− 2586	−106.4	× 77 / 278	−29.5
11	77,186	2565.5	− 2628	−62.5	× 43 / 278	−9.7
Sum, rounded to a whole point						−120

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −47, −53, −57, −68, −64, −77, −93, −91, −104, −120 → −77.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2017: 4 · 2017→2018: 11 · 2018→2019: 4 · 2019→2021: 13 · 2021→2022: 16 · 2022→2023: 2 · 2023→2024: 13 · 2024→2025: 16 → average 9.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.4 × 2.66 = 25. Upper limit −52.4, lower limit −102.4.

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.