Anna Mckenney Intermediate: 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	105,988	2471.6	− 2552	−80.4	× 164 / 497	−26.5
7	105,990	2484.7	− 2567	−82.3	× 183 / 497	−30.3
8	105,992	2500.2	− 2586	−85.8	× 150 / 497	−25.9
Sum, rounded to a whole point						−83

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	98,474	2484.5	− 2552	−67.5	× 160 / 509	−21.2
7	98,476	2462.2	− 2567	−104.8	× 177 / 509	−36.4
8	98,477	2497.0	− 2586	−89	× 172 / 509	−30.1
Sum, rounded to a whole point						−88

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	101,341	2491.1	− 2552	−60.9	× 196 / 545	−21.9
7	101,342	2495.5	− 2567	−71.5	× 179 / 545	−23.5
8	101,344	2488.5	− 2586	−97.5	× 170 / 545	−30.4
Sum, rounded to a whole point						−76

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	101,495	2504.3	− 2552	−47.7	× 181 / 559	−15.4
7	101,498	2485.9	− 2567	−81.1	× 204 / 559	−29.6
8	101,499	2515.2	− 2586	−70.8	× 174 / 559	−22
Sum, rounded to a whole point						−67

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	102,146	2482.7	− 2552	−69.3	× 218 / 610	−24.8
7	102,147	2503.3	− 2567	−63.7	× 192 / 610	−20
8	102,148	2488.5	− 2586	−97.5	× 200 / 610	−32
Sum, rounded to a whole point						−77

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	100,013	2434.4	− 2552	−117.6	× 142 / 403	−41.4
7	100,014	2463.8	− 2567	−103.2	× 128 / 403	−32.8
8	100,015	2469.8	− 2586	−116.2	× 133 / 403	−38.3
Sum, rounded to a whole point						−113

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	102,427	2460.6	− 2552	−91.4	× 181 / 559	−29.6
7	102,428	2456.1	− 2567	−110.9	× 186 / 559	−36.9
8	102,429	2495.3	− 2586	−90.7	× 192 / 559	−31.2
Sum, rounded to a whole point						−98

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	102,239	2457.2	− 2552	−94.8	× 181 / 532	−32.3
7	102,240	2465.2	− 2567	−101.8	× 181 / 532	−34.6
8	102,241	2478.0	− 2586	−108	× 170 / 532	−34.5
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	102,134	2451.4	− 2552	−100.6	× 199 / 578	−34.6
7	102,135	2457.0	− 2567	−110	× 194 / 578	−36.9
8	102,136	2465.4	− 2586	−120.6	× 185 / 578	−38.6
Sum, rounded to a whole point						−110

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	101,792	2449.0	− 2552	−103	× 171 / 533	−33
7	101,793	2456.9	− 2567	−110.1	× 190 / 533	−39.2
8	101,794	2478.9	− 2586	−107.1	× 172 / 533	−34.6
Sum, rounded to a whole point						−107

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −83, −88, −76, −67, −77, −113, −98, −101, −110, −107 → −92
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 5 · 2016→2017: 12 · 2017→2018: 9 · 2018→2019: 10 · 2019→2021: 36 · 2021→2022: 15 · 2022→2023: 3 · 2023→2024: 9 · 2024→2025: 3 → average 11.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.3 × 2.66 = 30.1. Upper limit −61.9, lower limit −122.1.

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.