Perris Union High: math

The shaded band is this district'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
5	57,911	2448.6	− 2528	−79.4	× 45 / 3704	−1
6	57,913	2475.3	− 2552	−76.7	× 119 / 3704	−2.5
7	57,915	2476.0	− 2567	−91	× 746 / 3704	−18.3
8	57,917	2480.3	− 2586	−105.7	× 749 / 3704	−21.4
11	57,919	2527.0	− 2628	−101	× 2045 / 3704	−55.8
Sum, rounded to a whole point						−99

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	53,765	2419.7	− 2528	−108.3	× 63 / 3692	−1.8
6	53,768	2453.6	− 2552	−98.4	× 114 / 3692	−3
7	53,770	2460.0	− 2567	−107	× 783 / 3692	−22.7
8	53,771	2469.9	− 2586	−116.1	× 732 / 3692	−23
11	53,773	2533.7	− 2628	−94.3	× 2000 / 3692	−51.1
Sum, rounded to a whole point						−102

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	55,323	2418.5	− 2528	−109.5	× 66 / 3758	−1.9
6	55,324	2459.6	− 2552	−92.4	× 123 / 3758	−3
7	55,327	2451.6	− 2567	−115.4	× 706 / 3758	−21.7
8	55,328	2457.1	− 2586	−128.9	× 761 / 3758	−26.1
11	55,331	2527.5	− 2628	−100.5	× 2102 / 3758	−56.2
Sum, rounded to a whole point						−109

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	55,417	2438.6	− 2528	−89.4	× 60 / 3629	−1.5
6	55,419	2457.2	− 2552	−94.8	× 118 / 3629	−3.1
7	55,421	2458.3	− 2567	−108.7	× 690 / 3629	−20.7
8	55,423	2464.7	− 2586	−121.3	× 715 / 3629	−23.9
11	55,425	2522.3	− 2628	−105.7	× 2046 / 3629	−59.6
Sum, rounded to a whole point						−109

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	55,678	2412.9	− 2528	−115.1	× 65 / 3662	−2
6	55,679	2464.5	− 2552	−87.5	× 99 / 3662	−2.4
7	55,680	2465.4	− 2567	−101.6	× 774 / 3662	−21.5
8	55,681	2472.5	− 2586	−113.5	× 711 / 3662	−22
11	55,682	2537.3	− 2628	−90.7	× 2013 / 3662	−49.9
Sum, rounded to a whole point						−98

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	54,429	2416.3	− 2528	−111.7	× 38 / 2162	−2
6	54,430	2461.8	− 2552	−90.2	× 88 / 2162	−3.7
7	54,431	2463.3	− 2567	−103.7	× 411 / 2162	−19.7
8	54,432	2461.2	− 2586	−124.8	× 466 / 2162	−26.9
11	54,433	2562.8	− 2628	−65.2	× 1159 / 2162	−35
Sum, rounded to a whole point						−87

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	55,736	2402.3	− 2528	−125.7	× 56 / 3466	−2
6	55,737	2462.2	− 2552	−89.8	× 90 / 3466	−2.3
7	55,738	2445.0	− 2567	−122	× 622 / 3466	−21.9
8	55,739	2435.7	− 2586	−150.3	× 626 / 3466	−27.1
11	55,740	2501.5	− 2628	−126.5	× 2072 / 3466	−75.6
Sum, rounded to a whole point						−129

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	55,687	2415.5	− 2528	−112.5	× 49 / 3862	−1.4
6	55,688	2462.7	− 2552	−89.3	× 95 / 3862	−2.2
7	55,689	2442.1	− 2567	−124.9	× 622 / 3862	−20.1
8	55,690	2430.2	− 2586	−155.8	× 604 / 3862	−24.4
11	55,691	2492.9	− 2628	−135.1	× 2492 / 3862	−87.2
Sum, rounded to a whole point						−135

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	55,563	2445.3	− 2528	−82.7	× 33 / 3863	−0.7
6	55,564	2437.8	− 2552	−114.2	× 91 / 3863	−2.7
7	55,565	2458.4	− 2567	−108.6	× 619 / 3863	−17.4
8	55,566	2431.7	− 2586	−154.3	× 656 / 3863	−26.2
11	55,567	2504.7	− 2628	−123.3	× 2464 / 3863	−78.6
Sum, rounded to a whole point						−126

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	55,317	2440.0	− 2528	−88	× 30 / 3631	−0.7
6	55,318	2464.2	− 2552	−87.8	× 88 / 3631	−2.1
7	55,319	2443.0	− 2567	−124	× 616 / 3631	−21
8	55,320	2456.7	− 2586	−129.3	× 606 / 3631	−21.6
11	55,321	2512.1	− 2628	−115.9	× 2291 / 3631	−73.1
Sum, rounded to a whole point						−119

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	55,234	2436.3	− 2528	−91.7	× 54 / 3633	−1.4
6	55,235	2468.9	− 2552	−83.1	× 87 / 3633	−2
7	55,236	2455.3	− 2567	−111.7	× 524 / 3633	−16.1
8	55,237	2440.6	− 2586	−145.4	× 605 / 3633	−24.2
11	55,238	2513.7	− 2628	−114.3	× 2363 / 3633	−74.3
Sum, rounded to a whole point						−118

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −99, −102, −109, −109, −98, −87, −129, −135, −126, −119, −118 → −111.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 7 · 2017→2018: 0 · 2018→2019: 11 · 2019→2021: 11 · 2021→2022: 42 · 2022→2023: 6 · 2023→2024: 9 · 2024→2025: 7 · 2025→2026: 1 → average 9.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.7 × 2.66 = 25.8. Upper limit −86.1, lower limit −137.7.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

Perris Union High