Indio Middle: 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	56,373	2442.7	− 2552	−109.3	× 262 / 822	−34.8
7	56,374	2476.0	− 2567	−91	× 258 / 822	−28.6
8	56,377	2483.6	− 2586	−102.4	× 302 / 822	−37.6
Sum, rounded to a whole point						−101

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	52,344	2439.6	− 2552	−112.4	× 256 / 774	−37.2
7	52,346	2462.1	− 2567	−104.9	× 263 / 774	−35.6
8	52,347	2493.7	− 2586	−92.3	× 255 / 774	−30.4
Sum, rounded to a whole point						−103

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	53,851	2451.2	− 2552	−100.8	× 274 / 787	−35.1
7	53,853	2475.6	− 2567	−91.4	× 247 / 787	−28.7
8	53,855	2482.8	− 2586	−103.2	× 266 / 787	−34.9
Sum, rounded to a whole point						−99

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	53,949	2425.6	− 2552	−126.4	× 265 / 771	−43.4
7	53,951	2462.1	− 2567	−104.9	× 269 / 771	−36.6
8	53,954	2474.1	− 2586	−111.9	× 237 / 771	−34.4
Sum, rounded to a whole point						−114

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	54,188	2433.9	− 2552	−118.1	× 279 / 830	−39.7
7	54,189	2436.5	− 2567	−130.5	× 282 / 830	−44.3
8	54,190	2463.4	− 2586	−122.6	× 269 / 830	−39.7
Sum, rounded to a whole point						−124

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	54,244	2413.4	− 2552	−138.6	× 266 / 740	−49.8
7	54,245	2447.3	− 2567	−119.7	× 231 / 740	−37.4
8	54,246	2437.7	− 2586	−148.3	× 243 / 740	−48.7
Sum, rounded to a whole point						−136

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	54,187	2401.9	− 2552	−150.1	× 258 / 770	−50.3
7	54,188	2431.5	− 2567	−135.5	× 271 / 770	−47.7
8	54,189	2455.4	− 2586	−130.6	× 241 / 770	−40.9
Sum, rounded to a whole point						−139

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	54,055	2397.2	− 2552	−154.8	× 260 / 775	−51.9
7	54,056	2424.9	− 2567	−142.1	× 263 / 775	−48.2
8	54,057	2446.4	− 2586	−139.6	× 252 / 775	−45.4
Sum, rounded to a whole point						−146

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	53,791	2405.8	− 2552	−146.2	× 242 / 752	−47
7	53,792	2426.6	− 2567	−140.4	× 251 / 752	−46.9
8	53,793	2431.3	− 2586	−154.7	× 259 / 752	−53.3
Sum, rounded to a whole point						−147

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −101, −103, −99, −114, −124, −136, −139, −146, −147 → −123.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 4 · 2017→2018: 15 · 2018→2019: 10 · 2019→2022: 12 · 2022→2023: 3 · 2023→2024: 7 · 2024→2025: 1 → average 6.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.8 × 2.66 = 18.1. Upper limit −105.1, lower limit −141.3.

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.