Haydock Academy Of Arts & Sciences: 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	103,510	2424.7	− 2552	−127.3	× 249 / 848	−37.4
7	103,511	2454.8	− 2567	−112.2	× 270 / 848	−35.7
8	103,514	2472.6	− 2586	−113.4	× 329 / 848	−44
Sum, rounded to a whole point						−117

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	96,195	2435.8	− 2552	−116.2	× 295 / 823	−41.7
7	96,198	2460.4	− 2567	−106.6	× 265 / 823	−34.3
8	96,199	2473.2	− 2586	−112.8	× 263 / 823	−36
Sum, rounded to a whole point						−112

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	98,982	2422.0	− 2552	−130	× 309 / 879	−45.7
7	98,984	2447.7	− 2567	−119.3	× 293 / 879	−39.8
8	98,986	2461.2	− 2586	−124.8	× 277 / 879	−39.3
Sum, rounded to a whole point						−125

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	99,137	2422.4	− 2552	−129.6	× 316 / 904	−45.3
7	99,139	2441.2	− 2567	−125.8	× 304 / 904	−42.3
8	99,141	2458.1	− 2586	−127.9	× 284 / 904	−40.2
Sum, rounded to a whole point						−128

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	99,804	2445.1	− 2552	−106.9	× 297 / 894	−35.5
7	99,805	2450.5	− 2567	−116.5	× 304 / 894	−39.6
8	99,806	2474.6	− 2586	−111.4	× 293 / 894	−36.5
Sum, rounded to a whole point						−112

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	100,003	2433.8	− 2552	−118.2	× 265 / 776	−40.4
7	100,004	2456.2	− 2567	−110.8	× 238 / 776	−34
8	100,005	2451.2	− 2586	−134.8	× 273 / 776	−47.4
Sum, rounded to a whole point						−122

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	99,845	2448.0	− 2552	−104	× 224 / 704	−33.1
7	99,846	2468.1	− 2567	−98.9	× 247 / 704	−34.7
8	99,847	2459.7	− 2586	−126.3	× 233 / 704	−41.8
Sum, rounded to a whole point						−110

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	99,724	2440.8	− 2552	−111.2	× 237 / 693	−38
7	99,725	2472.8	− 2567	−94.2	× 206 / 693	−28
8	99,726	2477.7	− 2586	−108.3	× 250 / 693	−39.1
Sum, rounded to a whole point						−105

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	99,430	2448.4	− 2552	−103.6	× 213 / 640	−34.5
7	99,431	2480.9	− 2567	−86.1	× 227 / 640	−30.5
8	99,432	2498.8	− 2586	−87.2	× 200 / 640	−27.3
Sum, rounded to a whole point						−92

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −117, −112, −125, −128, −112, −122, −110, −105, −92 → −113.7
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: 13 · 2017→2018: 3 · 2018→2019: 16 · 2019→2022: 10 · 2022→2023: 12 · 2023→2024: 5 · 2024→2025: 13 → average 9.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.6 × 2.66 = 25.5. Upper limit −88.2, lower limit −139.2.

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.