Irwin Academy Of Performing Arts: english

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	68,564	2347.8	− 2432	−84.2	× 118 / 419	−23.7
4	68,567	2411.9	− 2473	−61.1	× 108 / 419	−15.7
5	68,568	2438.3	− 2502	−63.7	× 99 / 419	−15.1
6	68,571	2483.4	− 2531	−47.6	× 94 / 419	−10.7
Sum, rounded to a whole point						−65

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,511	2364.1	− 2432	−67.9	× 107 / 421	−17.3
4	63,513	2418.1	− 2473	−54.9	× 111 / 421	−14.5
5	63,516	2448.7	− 2502	−53.3	× 99 / 421	−12.5
6	63,517	2483.5	− 2531	−47.5	× 104 / 421	−11.7
Sum, rounded to a whole point						−56

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,310	2358.4	− 2432	−73.6	× 86 / 399	−15.9
4	65,312	2398.3	− 2473	−74.7	× 102 / 399	−19.1
5	65,314	2391.7	− 2502	−110.3	× 117 / 399	−32.3
6	65,316	2490.8	− 2531	−40.2	× 94 / 399	−9.5
Sum, rounded to a whole point						−77

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,393	2351.4	− 2432	−80.6	× 109 / 403	−21.8
4	65,395	2393.4	− 2473	−79.6	× 89 / 403	−17.6
5	65,397	2432.1	− 2502	−69.9	× 99 / 403	−17.2
6	65,399	2467.0	− 2531	−64	× 106 / 403	−16.8
Sum, rounded to a whole point						−73

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,778	2355.1	− 2432	−76.9	× 104 / 383	−20.9
4	65,779	2404.3	− 2473	−68.7	× 96 / 383	−17.2
5	65,780	2446.6	− 2502	−55.4	× 88 / 383	−12.7
6	65,781	2464.1	− 2531	−66.9	× 95 / 383	−16.6
Sum, rounded to a whole point						−67

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,839	2334.2	− 2432	−97.8	× 76 / 326	−22.8
4	65,840	2380.0	− 2473	−93	× 88 / 326	−25.1
5	65,841	2430.7	− 2502	−71.3	× 73 / 326	−16
6	65,842	2470.7	− 2531	−60.3	× 89 / 326	−16.5
Sum, rounded to a whole point						−80

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,846	2323.0	− 2432	−109	× 94 / 339	−30.2
4	65,847	2377.1	− 2473	−95.9	× 72 / 339	−20.4
5	65,848	2416.6	− 2502	−85.4	× 92 / 339	−23.2
6	65,849	2488.8	− 2531	−42.2	× 81 / 339	−10.1
Sum, rounded to a whole point						−84

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,814	2351.3	− 2432	−80.7	× 79 / 317	−20.1
4	65,815	2378.1	− 2473	−94.9	× 79 / 317	−23.7
5	65,816	2440.6	− 2502	−61.4	× 68 / 317	−13.2
6	65,817	2454.4	− 2531	−76.6	× 91 / 317	−22
Sum, rounded to a whole point						−79

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,574	2349.8	− 2432	−82.2	× 93 / 314	−24.3
4	65,575	2385.0	− 2473	−88	× 72 / 314	−20.2
5	65,576	2429.8	− 2502	−72.2	× 76 / 314	−17.5
6	65,577	2506.7	− 2531	−24.3	× 73 / 314	−5.6
Sum, rounded to a whole point						−68

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −65, −56, −77, −73, −67, −80, −84, −79, −68 → −72.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 9 · 2016→2017: 21 · 2017→2018: 4 · 2018→2019: 6 · 2019→2022: 13 · 2022→2023: 4 · 2023→2024: 5 · 2024→2025: 11 → average 9.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.1 × 2.66 = 24.2. Upper limit −47.9, lower limit −96.3.

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.