Palmdale Learning Plaza: 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
3	35,714	2392.1	− 2436	−43.9	× 86 / 548	−6.9
4	35,715	2440.1	− 2485	−44.9	× 88 / 548	−7.2
5	35,718	2482.3	− 2528	−45.7	× 97 / 548	−8.1
6	35,719	2482.4	− 2552	−69.6	× 96 / 548	−12.2
7	35,722	2548.9	− 2567	−18.1	× 90 / 548	−3
8	35,723	2621.0	− 2586	35	× 91 / 548	5.8
Sum, rounded to a whole point						−32

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,366	2411.8	− 2436	−24.2	× 89 / 544	−4
4	33,369	2423.5	− 2485	−61.5	× 91 / 544	−10.3
5	33,370	2461.6	− 2528	−66.4	× 93 / 544	−11.4
6	33,373	2496.8	− 2552	−55.2	× 96 / 544	−9.7
7	33,374	2534.4	− 2567	−32.6	× 85 / 544	−5.1
8	33,377	2577.0	− 2586	−9	× 90 / 544	−1.5
Sum, rounded to a whole point						−42

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,956	2413.9	− 2436	−22.1	× 89 / 536	−3.7
4	33,957	2460.2	− 2485	−24.8	× 92 / 536	−4.3
5	33,960	2447.4	− 2528	−80.6	× 94 / 536	−14.1
6	33,961	2469.0	− 2552	−83	× 92 / 536	−14.2
7	33,964	2551.1	− 2567	−15.9	× 83 / 536	−2.5
8	33,965	2580.2	− 2586	−5.8	× 86 / 536	−0.9
Sum, rounded to a whole point						−40

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,965	2415.0	− 2436	−21	× 87 / 532	−3.4
4	33,967	2457.4	− 2485	−27.6	× 94 / 532	−4.9
5	33,969	2470.5	− 2528	−57.5	× 95 / 532	−10.3
6	33,971	2485.8	− 2552	−66.2	× 89 / 532	−11.1
7	33,973	2521.5	− 2567	−45.5	× 83 / 532	−7.1
8	33,975	2568.7	− 2586	−17.3	× 84 / 532	−2.7
Sum, rounded to a whole point						−39

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	34,150	2407.9	− 2436	−28.1	× 92 / 576	−4.5
4	34,151	2451.6	− 2485	−33.4	× 97 / 576	−5.6
5	34,152	2483.2	− 2528	−44.8	× 102 / 576	−7.9
6	34,153	2506.3	− 2552	−45.7	× 96 / 576	−7.6
7	34,154	2511.9	− 2567	−55.1	× 95 / 576	−9.1
8	34,155	2541.1	− 2586	−44.9	× 94 / 576	−7.3
Sum, rounded to a whole point						−42

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	34,063	2376.4	− 2436	−59.6	× 88 / 510	−10.3
4	34,064	2434.5	− 2485	−50.5	× 94 / 510	−9.3
5	34,065	2477.4	− 2528	−50.6	× 95 / 510	−9.4
6	34,066	2487.6	− 2552	−64.4	× 84 / 510	−10.6
7	34,067	2491.0	− 2567	−76	× 83 / 510	−12.4
8	34,068	2491.4	− 2586	−94.6	× 66 / 510	−12.2
Sum, rounded to a whole point						−64

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	34,114	2403.9	− 2436	−32.1	× 91 / 523	−5.6
4	34,115	2429.0	− 2485	−56	× 89 / 523	−9.5
5	34,116	2485.5	− 2528	−42.5	× 96 / 523	−7.8
6	34,117	2497.5	− 2552	−54.5	× 80 / 523	−8.3
7	34,118	2506.0	− 2567	−61	× 79 / 523	−9.2
8	34,119	2514.8	− 2586	−71.2	× 88 / 523	−12
Sum, rounded to a whole point						−52

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,970	2401.6	− 2436	−34.4	× 96 / 526	−6.3
4	33,971	2450.9	− 2485	−34.1	× 89 / 526	−5.8
5	33,972	2468.4	− 2528	−59.6	× 90 / 526	−10.2
6	33,973	2474.5	− 2552	−77.5	× 89 / 526	−13.1
7	33,974	2519.8	− 2567	−47.2	× 84 / 526	−7.5
8	33,975	2541.1	− 2586	−44.9	× 78 / 526	−6.7
Sum, rounded to a whole point						−50

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,833	2413.1	− 2436	−22.9	× 87 / 535	−3.7
4	33,834	2444.8	− 2485	−40.2	× 95 / 535	−7.1
5	33,835	2485.7	− 2528	−42.3	× 90 / 535	−7.1
6	33,836	2460.0	− 2552	−92	× 91 / 535	−15.6
7	33,837	2517.8	− 2567	−49.2	× 87 / 535	−8
8	33,838	2525.5	− 2586	−60.5	× 85 / 535	−9.6
Sum, rounded to a whole point						−51

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −32, −42, −40, −39, −42, −64, −52, −50, −51 → −45.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 2 · 2017→2018: 1 · 2018→2019: 3 · 2019→2022: 22 · 2022→2023: 12 · 2023→2024: 2 · 2024→2025: 1 → average 6.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.6 × 2.66 = 17.6. Upper limit −28.2, lower limit −63.4.

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.