Norwalk-La Mirada Unified: 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
3	35,244	2409.9	− 2436	−26.1	× 1337 / 9860	−3.5
4	35,245	2445.1	− 2485	−39.9	× 1377 / 9860	−5.6
5	35,248	2473.6	− 2528	−54.4	× 1346 / 9860	−7.4
6	35,249	2482.8	− 2552	−69.2	× 1450 / 9860	−10.2
7	35,252	2495.7	− 2567	−71.3	× 1479 / 9860	−10.7
8	35,253	2517.3	− 2586	−68.7	× 1467 / 9860	−10.2
11	35,256	2528.3	− 2628	−99.7	× 1404 / 9860	−14.2
Sum, rounded to a whole point						−62

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	32,912	2417.2	− 2436	−18.8	× 1384 / 9878	−2.6
4	32,913	2457.4	− 2485	−27.6	× 1337 / 9878	−3.7
5	32,916	2476.3	− 2528	−51.7	× 1403 / 9878	−7.3
6	32,917	2488.4	− 2552	−63.6	× 1395 / 9878	−9
7	32,920	2499.4	− 2567	−67.6	× 1498 / 9878	−10.3
8	32,922	2514.6	− 2586	−71.4	× 1472 / 9878	−10.6
11	32,923	2529.0	− 2628	−99	× 1389 / 9878	−13.9
Sum, rounded to a whole point						−58

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,477	2423.3	− 2436	−12.7	× 1328 / 9691	−1.7
4	33,480	2455.4	− 2485	−29.6	× 1393 / 9691	−4.3
5	33,482	2480.0	− 2528	−48	× 1329 / 9691	−6.6
6	33,484	2486.9	− 2552	−65.1	× 1413 / 9691	−9.5
7	33,485	2510.0	− 2567	−57	× 1413 / 9691	−8.3
8	33,488	2517.6	− 2586	−68.4	× 1509 / 9691	−10.7
11	33,490	2526.1	− 2628	−101.9	× 1306 / 9691	−13.7
Sum, rounded to a whole point						−55

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,501	2428.5	− 2436	−7.5	× 1241 / 9335	−1
4	33,503	2467.0	− 2485	−18	× 1296 / 9335	−2.5
5	33,505	2479.3	− 2528	−48.7	× 1377 / 9335	−7.2
6	33,507	2496.3	− 2552	−55.7	× 1313 / 9335	−7.8
7	33,509	2500.0	− 2567	−67	× 1413 / 9335	−10.1
8	33,511	2521.3	− 2586	−64.7	× 1392 / 9335	−9.6
11	33,513	2518.7	− 2628	−109.3	× 1303 / 9335	−15.3
Sum, rounded to a whole point						−54

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,681	2428.9	− 2436	−7.1	× 1324 / 9185	−1
4	33,682	2473.1	− 2485	−11.9	× 1227 / 9185	−1.6
5	33,683	2493.6	− 2528	−34.4	× 1288 / 9185	−4.8
6	33,684	2502.6	− 2552	−49.4	× 1351 / 9185	−7.3
7	33,685	2512.1	− 2567	−54.9	× 1305 / 9185	−7.8
8	33,686	2521.0	− 2586	−65	× 1393 / 9185	−9.9
11	33,687	2530.2	− 2628	−97.8	× 1297 / 9185	−13.8
Sum, rounded to a whole point						−46

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	32,894	2563.9	− 2628	−64.1	× 482 / 482	−64.1
Sum, rounded to a whole point						−64

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,610	2421.0	− 2436	−15	× 1100 / 8229	−2
4	33,611	2451.8	− 2485	−33.2	× 1133 / 8229	−4.6
5	33,612	2465.7	− 2528	−62.3	× 1178 / 8229	−8.9
6	33,613	2467.4	− 2552	−84.6	× 1227 / 8229	−12.6
7	33,614	2496.0	− 2567	−71	× 1186 / 8229	−10.2
8	33,615	2490.6	− 2586	−95.4	× 1200 / 8229	−13.9
11	33,616	2526.5	− 2628	−101.5	× 1205 / 8229	−14.9
Sum, rounded to a whole point						−67

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,661	2424.6	− 2436	−11.4	× 1002 / 7965	−1.4
4	33,662	2465.3	− 2485	−19.7	× 1075 / 7965	−2.7
5	33,663	2480.5	− 2528	−47.5	× 1112 / 7965	−6.6
6	33,664	2478.5	− 2552	−73.5	× 1158 / 7965	−10.7
7	33,665	2485.8	− 2567	−81.2	× 1251 / 7965	−12.8
8	33,666	2508.3	− 2586	−77.7	× 1219 / 7965	−11.9
11	33,667	2516.9	− 2628	−111.1	× 1148 / 7965	−16
Sum, rounded to a whole point						−62

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,521	2425.8	− 2436	−10.2	× 980 / 7803	−1.3
4	33,522	2456.3	− 2485	−28.7	× 982 / 7803	−3.6
5	33,523	2481.0	− 2528	−47	× 1085 / 7803	−6.5
6	33,524	2483.0	− 2552	−69	× 1110 / 7803	−9.8
7	33,525	2495.6	− 2567	−71.4	× 1163 / 7803	−10.6
8	33,526	2504.3	− 2586	−81.7	× 1246 / 7803	−13
11	33,527	2528.5	− 2628	−99.5	× 1237 / 7803	−15.8
Sum, rounded to a whole point						−61

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,382	2428.7	− 2436	−7.3	× 988 / 7362	−1
4	33,383	2463.5	− 2485	−21.5	× 986 / 7362	−2.9
5	33,384	2477.7	− 2528	−50.3	× 975 / 7362	−6.7
6	33,385	2496.0	− 2552	−56	× 1069 / 7362	−8.1
7	33,386	2515.2	− 2567	−51.8	× 1134 / 7362	−8
8	33,387	2529.0	− 2586	−57	× 1142 / 7362	−8.8
11	33,388	2550.6	− 2628	−77.4	× 1068 / 7362	−11.2
Sum, rounded to a whole point						−47

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	33,386	2434.8	− 2436	−1.2	× 902 / 7091	−0.2
4	33,387	2459.9	− 2485	−25.1	× 968 / 7091	−3.4
5	33,388	2483.4	− 2528	−44.6	× 981 / 7091	−6.2
6	33,389	2487.4	− 2552	−64.6	× 985 / 7091	−9
7	33,390	2517.9	− 2567	−49.1	× 1057 / 7091	−7.3
8	33,391	2538.1	− 2586	−47.9	× 1106 / 7091	−7.5
11	33,392	2544.5	− 2628	−83.5	× 1092 / 7091	−12.9
Sum, rounded to a whole point						−46

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −62, −58, −55, −54, −46, −64, −67, −62, −61, −47, −46 → −56.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 4 · 2016→2017: 3 · 2017→2018: 1 · 2018→2019: 8 · 2019→2021: 18 · 2021→2022: 3 · 2022→2023: 5 · 2023→2024: 1 · 2024→2025: 14 · 2025→2026: 1 → average 5.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.8 × 2.66 = 15.4. Upper limit −41.1, lower limit −71.9.

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.

Norwalk-La Mirada Unified