Washington Irving Middle School Math, Music And En: 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
6	32,947	2510.2	− 2531	−20.8	× 118 / 571	−4.3
7	32,949	2521.3	− 2552	−30.7	× 242 / 571	−13
8	32,951	2538.2	− 2567	−28.8	× 211 / 571	−10.6
Sum, rounded to a whole point						−28

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,162	2513.1	− 2531	−17.9	× 109 / 635	−3.1
7	31,163	2530.5	− 2552	−21.5	× 288 / 635	−9.8
8	31,166	2546.6	− 2567	−20.4	× 238 / 635	−7.6
Sum, rounded to a whole point						−20

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,722	2510.7	− 2531	−20.3	× 144 / 716	−4.1
7	31,724	2526.8	− 2552	−25.2	× 291 / 716	−10.2
8	31,726	2552.3	− 2567	−14.7	× 281 / 716	−5.8
Sum, rounded to a whole point						−20

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,767	2511.1	− 2531	−19.9	× 154 / 725	−4.2
7	31,769	2531.9	− 2552	−20.1	× 281 / 725	−7.8
8	31,771	2543.3	− 2567	−23.7	× 290 / 725	−9.5
Sum, rounded to a whole point						−21

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,941	2506.0	− 2531	−25	× 206 / 743	−6.9
7	31,942	2532.7	− 2552	−19.3	× 272 / 743	−7.1
8	31,943	2571.0	− 2567	4	× 265 / 743	1.4
Sum, rounded to a whole point						−13

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,968	2539.4	− 2531	8.4	× 142 / 599	2
7	31,969	2551.7	− 2552	−0.3	× 229 / 599	−0.1
8	31,970	2575.5	− 2567	8.5	× 228 / 599	3.2
Sum, rounded to a whole point						5

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	32,025	2547.6	− 2531	16.6	× 210 / 667	5.2
7	32,026	2550.6	− 2552	−1.4	× 231 / 667	−0.5
8	32,027	2566.2	− 2567	−0.8	× 226 / 667	−0.3
Sum, rounded to a whole point						4

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,891	2552.5	− 2531	21.5	× 266 / 783	7.3
7	31,892	2557.7	− 2552	5.7	× 286 / 783	2.1
8	31,893	2566.0	− 2567	−1	× 231 / 783	−0.3
Sum, rounded to a whole point						9

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	31,750	2595.5	− 2531	64.5	× 243 / 877	17.9
7	31,751	2578.4	− 2552	26.4	× 355 / 877	10.7
8	31,752	2582.5	− 2567	15.5	× 279 / 877	4.9
Sum, rounded to a whole point						33

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −28, −20, −20, −21, −13, 5, 4, 9, 33 → −5.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 8 · 2016→2017: 0 · 2017→2018: 1 · 2018→2019: 8 · 2019→2022: 18 · 2022→2023: 1 · 2023→2024: 5 · 2024→2025: 24 → average 8.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.1 × 2.66 = 21.5. Upper limit 15.8, lower limit −27.2.

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.